Fix IME crash when leave VR mode.

System server crash when there is no selected input method and leave VR
mode. To avoid crash, we can try to update selected input method from
settings.

Fix: 121271327
Test: Manually remove input methods from device then run
ActivityManagerVrDisplayTests, system server should not crash when leave
VR mode.

Change-Id: I32a7f10d4f69700c2506d65b360fef5806c0e655
1 file changed