Merge "DO NOT MERGE: Fix NPE in ActivityManagerDisplayTests" into oreo-cts-dev am: 56f6f002ab  -s ours am: 3aa90a9877  -s ours am: 9c98fe00a4
am: 8c1ce2c7c3  -s ours

Change-Id: I9092d401e13d6475db4403f62e2799b2194b7e84