launcher3: Amend strict mode policy to account for activity leaks.

  detectActivityLeaks() will identify any cases where subclasses
  of Activity are leaking.

Bug: 392635961
Test: EXEMPT debug code
Flag: EXEMPT debug code
Change-Id: I28057738a7bb8951a39152f4a4e6954bd2b97706
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index a7a68d1..30ef24b 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -469,6 +469,7 @@
             StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                     .detectLeakedSqlLiteObjects()
                     .detectLeakedClosableObjects()
+                    .detectActivityLeaks()
                     .penaltyLog()
                     .penaltyDeath()
                     .build());