Coordinator: add explicit methods to determine if the device supports app management and which class is responsible for it.

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/DeviceCoordinator.java

@@ -140,4 +140,19 @@ public interface DeviceCoordinator {
      * Returns the readable name of the manufacturer.
      */
     String getManufacturer();
+
+    /**
+     * Returns true if this device/coordinator supports managing device apps.
+     *
+     * @return
+     */
+    boolean supportsAppsManagement();
+
+    /**
+     * Returns the Activity class that will be used to manage device apps.
+     *
+     * @return
+     */
+    Class<? extends Activity> getAppsManagementActivity();
+
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/UnknownDeviceCoordinator.java

@@ -142,4 +142,14 @@ public class UnknownDeviceCoordinator extends AbstractDeviceCoordinator {
     public String getManufacturer() {
         return "unknown";
     }
+
+    @Override
+    public boolean supportsAppsManagement() {
+        return false;
+    }
+
+    @Override
+    public Class<? extends Activity> getAppsManagementActivity() {
+        return null;
+    }
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandCoordinator.java

@@ -119,6 +119,16 @@ public class MiBandCoordinator extends AbstractDeviceCoordinator {
         return "Xiaomi";
     }
 
+    @Override
+    public boolean supportsAppsManagement() {
+        return false;
+    }
+
+    @Override
+    public Class<? extends Activity> getAppsManagementActivity() {
+        return null;
+    }
+
     public static boolean hasValidUserInfo() {
         String dummyMacAddress = MiBandService.MAC_ADDRESS_FILTER_1_1A + ":00:00:00";
         try {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/pebble/PebbleCoordinator.java

@@ -117,4 +117,14 @@ public class PebbleCoordinator extends AbstractDeviceCoordinator {
     public String getManufacturer() {
         return "Pebble";
     }
+
+    @Override
+    public boolean supportsAppsManagement() {
+        return true;
+    }
+
+    @Override
+    public Class<? extends Activity> getAppsManagementActivity() {
+        return AppManagerActivity.class;
+    }
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/vibratissimo/VibratissimoCoordinator.java

@@ -85,6 +85,16 @@ public class VibratissimoCoordinator extends AbstractDeviceCoordinator {
         return "Amor AG";
     }
 
+    @Override
+    public boolean supportsAppsManagement() {
+        return false;
+    }
+
+    @Override
+    public Class<? extends Activity> getAppsManagementActivity() {
+        return null;
+    }
+
     @Override
     protected void deleteDevice(@NonNull GBDevice gbDevice, @NonNull Device device, @NonNull DaoSession session) throws GBException {
         // nothing to delete, yet