Fix: SysUi crash on Pie recents

https://paranoidandroid.atlassian.net/browse/AOSPA-79

When toggling recent apps using pie controls on secondary user account,
system ui crashes.

Change-Id: Id43b79dadf4cc4a88534aa18e1138b1daa7eece8
Merge remote-tracking branch 'PA/kitkat' into remix-staging

Conflicts:
	packages/SystemUI/src/com/android/systemui/recent/RecentsActivity.java