DO NOT MERGE: Fix deadlock in AcitivityManagerService. am: 2d608378f4  -s ours am: bab9c1006a am: e85152c2fc am: ac143d2dfd  -s ours
am: 20bafe850d

Change-Id: I58b5b4073af01991d5dc35b68807319a8e3749b1