Enable minify optimizations for release builds (#1437)

## Description
Enables minify & resource shrinking for release builds. This should
improve overall performance a bit. It also decreases the apk size by
~15%.

Also updates AGP

### Related issues
N/A

### Testing
Emulator, but needs more testing before a final release

## Screenshots
N/A

## AI or LLM usage
None

app/proguard-rules.pro

@@ -1,21 +1,10 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
 -keepattributes SourceFile,LineNumberTable
 
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+-keep class com.github.damontecres.wholphin.util.mpv.* { *; }
+
+-keep class * extends com.google.protobuf.GeneratedMessageLite { *; }
+-keepclassmembers class * extends com.google.protobuf.GeneratedMessageLite {
+  <fields>;
+  <methods>;
+}
+-dontwarn com.google.protobuf.**