Shall clear calling identity to avoid destroying GraphicBuffer unexpectedly.

This changed apply to three APIs:
setShouldShowSystemDecors()
setShouldShowIme()
setShouldShowWithInsecureKeyguard()

Bug: 144750952
Test: by manual

Change-Id: I5061fd93d4b356d41089b1a6a0887679b36d8b20
(cherry picked from commit 3fae5b3fd17d94c52b4a4010bf17f0ddc748fef5)
1 file changed