Add protolog support to Quickstep

Flag: EXEMPT changes cannot be flagged
Bug: 293182501
Test: launcher builds
Doc: go/launcher-protolog-support
Change-Id: I302b442b99165c9591b9349ea200285a5b9c074c
diff --git a/proguard.flags b/proguard.flags
index 31edd8d..da00c00 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -57,3 +57,7 @@
 -keep class com.android.quickstep.** {
   *;
 }
+
+-keep class com.android.internal.protolog.** {
+  *;
+}