Fix calling startActivity() crash

Calling startActivity() from outside of an Activity  context requires
the FLAG_ACTIVITY_NEW_TASK flag. Override the Context to add this flag
to avoid crash.

Fixes: 138268580
Test: manual
Test: atest CtsAutoFillServiceTestCases
Change-Id: I7fd1f35c06a43be08d348c3dbed9155c4fcc59ef
1 file changed