From 9d27a928f2a98992dd911d6dff96ec5206eaf497 Mon Sep 17 00:00:00 2001
From: Jared Duke <jdduke@google.com>
Date: Mon, 19 Sep 2022 16:23:16 -0700
Subject: [PATCH] Only keep Parcelables if used

Use `-keepclassmembers` instead of `-keep` for Parcelable types
and their CREATOR members. This allows shrinking of Parcelable types
that aren't referenced while still preserving the necessary CREATOR
member when the classes are kept. This saves ~3MB across various
platform targets.

Bug: 238670321
Test: m + presubmit
Change-Id: I13508073dbc07e28aa93bb6604c8f838bcf72646
---
 core/proguard_basic_keeps.flags | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/proguard_basic_keeps.flags b/core/proguard_basic_keeps.flags
index 38feec37b8..f9d2d30d55 100644
--- a/core/proguard_basic_keeps.flags
+++ b/core/proguard_basic_keeps.flags
@@ -53,7 +53,7 @@
 # -keep class * extends android.app.BackupAgent
 
 # Parcelable CREATORs must be kept for Parcelable functionality
--keep class * implements android.os.Parcelable {
+-keepclassmembers class * implements android.os.Parcelable {
   public static final ** CREATOR;
 }