build: Enable ProGuard (#1650)

android/app/build.gradle

@@ -45,8 +45,6 @@ android {
     }
     buildTypes {
         release {
-            shrinkResources false
-            minifyEnabled false
             ndk {
                 abiFilters 'arm64-v8a', 'armeabi-v7a', 'x86_64'
             }

android/app/proguard-rules.pro

@@ -0,0 +1,23 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.kts.kts.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# These packages are referenced by ReVanced Patches
+-keep class app.revanced.patcher.** { *; }
+-keep class com.android.tools.smali.** { *; }
+-keep class kotlin.** { *; }
+-keepnames class com.google.common.collect.**
+
+# This package uses reflection internally, so do not remove and rename
+-keep class com.android.apksig.internal.** { *; }
+
+# Fix crash
+-keepnames class org.xmlpull.** { *; }
+
+# Fix build errors
+-dontwarn java.awt.**
+-dontwarn javax.**
+-dontwarn com.google.j2objc.annotations.*

android/gradle.properties

@@ -3,7 +3,6 @@ org.gradle.parallel=true
 org.gradle.daemon=true
 org.gradle.caching=true
 android.useAndroidX=true
-android.enableJetifier=true
 android.defaults.buildfeatures.buildconfig=true
 android.nonTransitiveRClass=false
 android.nonFinalResIds=false