Messaging: Meet Play memory/R8 rules, ship Q icon, and polish home chrome

Co-authored-by: Cursor <cursoragent@cursor.com>

proguard.flags

@@ -22,54 +22,45 @@
                 RuntimeVisibleTypeAnnotations,
                 AnnotationDefault
 
--keep class com.android.messaging.* { *; }
--keep class com.android.messaging.*.* { *; }
--keep class com.android.messaging.*.*.* { *; }
-
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
+# Manifest / XML entry points. Do not keep the whole app or androidx packages —
+# Play requires 25% shrink / optimize / obfuscate when uncompressed DEX > 10 MB.
 -keep public class * extends android.app.Activity {
   void <init>();
 }
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
 -keep public class * extends android.app.Application {
   void <init>();
 }
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
 -keep public class * extends android.app.Service {
   void <init>();
 }
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
 -keep public class * extends android.content.BroadcastReceiver {
   void <init>();
 }
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
 -keep public class * extends android.content.ContentProvider {
   void <init>();
 }
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
 -keep public class * extends android.app.backup.BackupAgentHelper {
   void <init>();
 }
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
 -keep public class * extends android.preference.Preference {
   void <init>();
 }
-# TODO(b/373579455): Evaluate if <init> needs to be kept.
+-keep public class * extends androidx.preference.Preference {
+  public <init>(android.content.Context, android.util.AttributeSet);
+  public <init>(android.content.Context, android.util.AttributeSet, int);
+}
 -keep public class * extends androidx.fragment.app.Fragment {
   void <init>();
 }
--keep public class com.android.vcard.* { *; }
 
--keep class androidx.collection.* { *; }
--keep class androidx.core.* { *; }
--keep class androidx.core.*.* { *; }
--keep class androidx.appcompat.* { *; }
--keep class androidx.appcompat.*.* { *; }
--keep class androidx.recyclerview.widget.* { *; }
--keep class androidx.viewpager.widget.* { *; }
-
-# Keep rastermill classes that need to be accessed from native code (JNI)
--keep class android.support.rastermill.** { *; }
+# Actions cross the ActionService / BackgroundWorker via Parcelable extras.
+-keep class com.android.messaging.datamodel.action.Action {
+  void <init>();
+}
+-keep class * extends com.android.messaging.datamodel.action.Action {
+  public static android.os.Parcelable$Creator CREATOR;
+  <init>(...);
+}
 
 # Preserve the name of the getCaller method so it can find itself in the stack trace it generates
 -keepclassmembers public class com.android.messaging.util.DebugUtils {
@@ -77,7 +68,7 @@
 }
 
 # Keep the static fields of referenced inner classes of auto-generated R classes, in case we
-# access those fields by reflection (e.g. EmojiMarkup)
+# access those fields by reflection
 -keepclassmembers class **.R$* {
     public static <fields>;
 }