Merge "Clear TestableLoopers in SysuiTestCase" into tm-qpr-dev am: 78f5ef56e1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20609771

Change-Id: Idb1fd31227ebce9b50b944add5cdd22d8f950671
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

packages/SystemUI/tests/utils/src/com/android/systemui/SysuiTestCase.java

@@ -136,6 +136,8 @@ public abstract class SysuiTestCase {
                 InstrumentationRegistry.getArguments());
         if (TestableLooper.get(this) != null) {
             TestableLooper.get(this).processAllMessages();
+            // Must remove static reference to this test object to prevent leak (b/261039202)
+            TestableLooper.remove(this);
         }
         disallowTestableLooperAsMainThread();
         mContext.cleanUpReceivers(this.getClass().getSimpleName());