Reformat code and optimize imports

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/EventHandler.java

@@ -2,7 +2,6 @@ package nodomain.freeyourgadget.gadgetbridge;
 
 import android.net.Uri;
 
-import java.net.URI;
 import java.util.UUID;
 
 public interface EventHandler {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/GBDevice.java

@@ -131,9 +131,10 @@ public class GBDevice implements Parcelable {
     /**
      * Marks the device as busy, performing a certain task. While busy, no other operations will
      * be performed on the device.
-     *
+     * <p/>
      * Note that nested busy tasks are not supported, every single call to #setBusyTask()
      * or unsetBusy() has an effect.
+     *
      * @param task a textual name of the task to be performed, possibly displayed to the user
      */
     public void setBusyTask(String task) {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/btle/GattCallback.java

@@ -68,19 +68,19 @@ public interface GattCallback {
                                  BluetoothGattCharacteristic characteristic);
 
     /**
-     * @see BluetoothGattCallback#onDescriptorRead(BluetoothGatt, BluetoothGattDescriptor, int)
      * @param gatt
      * @param descriptor
      * @param status
+     * @see BluetoothGattCallback#onDescriptorRead(BluetoothGatt, BluetoothGattDescriptor, int)
      */
     public void onDescriptorRead(BluetoothGatt gatt, BluetoothGattDescriptor descriptor,
                                  int status);
 
     /**
-     * @see BluetoothGattCallback#onDescriptorWrite(BluetoothGatt, BluetoothGattDescriptor, int)
      * @param gatt
      * @param descriptor
      * @param status
+     * @see BluetoothGattCallback#onDescriptorWrite(BluetoothGatt, BluetoothGattDescriptor, int)
      */
     public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor,
                                   int status);

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/btle/NotifyAction.java

@@ -3,13 +3,10 @@ package nodomain.freeyourgadget.gadgetbridge.btle;
 import android.bluetooth.BluetoothGatt;
 import android.bluetooth.BluetoothGattCallback;
 import android.bluetooth.BluetoothGattCharacteristic;
-import android.bluetooth.BluetoothGattDescriptor;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import nodomain.freeyourgadget.gadgetbridge.miband.MiBandService;
-
 /**
  * Enables or disables notifications for a given GATT characteristic.
  * The result will be made available asynchronously through the

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/btle/PlainAction.java

@@ -1,7 +1,5 @@
 package nodomain.freeyourgadget.gadgetbridge.btle;
 
-import android.bluetooth.BluetoothGatt;
-
 /**
  * An abstract non-BTLE action. It performs no bluetooth operation,
  * does not have a BluetoothGattCharacteristic instance and expects no result.

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/btle/SetDeviceBusyAction.java

@@ -12,6 +12,7 @@ public class SetDeviceBusyAction extends PlainAction {
 
     /**
      * When run, will mark the device as busy (or not busy).
+     *
      * @param device   the device to mark
      * @param busyTask the task name to set as busy task, or null to mark as not busy
      * @param context

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/btle/TransactionBuilder.java

@@ -5,8 +5,6 @@ import android.bluetooth.BluetoothGattCharacteristic;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import nodomain.freeyourgadget.gadgetbridge.miband.MiBandNotifyAction;
-
 public class TransactionBuilder {
     private static final Logger LOG = LoggerFactory.getLogger(TransactionBuilder.class);
 

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/ActivityDatabaseHandler.java

@@ -44,6 +44,7 @@ public class ActivityDatabaseHandler extends SQLiteOpenHelper {
     /**
      * WITHOUT ROWID is only available with sqlite 3.8.2, which is available
      * with Lollipop and later.
+     *
      * @return the "WITHOUT ROWID" string or an empty string for pre-Lollipop devices
      */
     private String getWithoutRowId() {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/miband/MiBandNotifyAction.java

@@ -8,16 +8,14 @@ import android.bluetooth.BluetoothGattDescriptor;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import nodomain.freeyourgadget.gadgetbridge.btle.BtLEAction;
 import nodomain.freeyourgadget.gadgetbridge.btle.NotifyAction;
 import nodomain.freeyourgadget.gadgetbridge.btle.TransactionBuilder;
-import nodomain.freeyourgadget.gadgetbridge.miband.MiBandService;
 
 /**
  * Enables or disables notifications for a given GATT characteristic.
  * The result will be made available asynchronously through the
  * {@link BluetoothGattCallback}.
- *
+ * <p/>
  * This class is Mi Band specific.
  */
 public class MiBandNotifyAction extends NotifyAction {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/miband/MiBandSupport.java

@@ -86,6 +86,7 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
      * Last action of initialization sequence. Sets the device to initialized.
      * It is only invoked if all other actions were successfully run, so the device
      * must be initialized, then.
+     *
      * @param builder
      */
     private void setInitialized(TransactionBuilder builder) {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/miband/SetDeviceStateAction.java

@@ -4,7 +4,6 @@ import android.bluetooth.BluetoothGatt;
 import android.content.Context;
 
 import nodomain.freeyourgadget.gadgetbridge.GBDevice;
-import nodomain.freeyourgadget.gadgetbridge.btle.BtLEAction;
 import nodomain.freeyourgadget.gadgetbridge.btle.PlainAction;
 
 public class SetDeviceStateAction extends PlainAction {