AudioService: fix safe volume enforced even when disabled

On onConfigureSafeVolume, the proper API was not used, leading
to the setting not being respected. Sometimes after boot, the
heaadset volume will be set back to the safe volume.

Change-Id: I5ba8bb1a18ce97ed64646663c7e75cb277356778
Set ActionMode title to the number of selected files

After change of orientation ActionMode is recreated without previously
set title. It needs to be updated in onCreateActionMode callback.

Change-Id: If5f36e8ad6d1b5cf04ed242611fd037969d73517
Avoid SystemUI crash due to NPE

BaseStatusBar.createNotificationViews() returns null
when it reports handleNotificationError(), leading to
a forced crash of the misbehaving app. However, it
should not add a null object of Notification.Entry
since it will also crash SystemUI (crashing at compare).

Change-Id: I86678c8024e931420b0fbab1f36b330e7e75d581