Do not lock when calling startActivityFromRecents

When calling ActivityStarter#execute without known activity info,
it will need to resolve the intent and check content provider uri
permission. That may hit potential deadlock (acquire AM lock) so
it will return denial directly if the WM global lock is held.

Bug: 189057104
Test: Start and stop recording, tap the notification to view the
      recorded result. Press back to finish the activity. Launch
      the activity from recents app without permission denial.
Test: Pin apps to split from recents.

Change-Id: Ibf3fee1f29f3069f0adfa85ed983f6d48bf7ebd7