Fixed issue the IME hides the ID_LOGIN button

 - CtsAutoFillServiceTestCases
   Depending on the height of the IME,
   the ID_LOGIN button may not be visible.
   In order to avoid that, generate back key event
   to hide IME before pressing ID_LOGIN button.

Bug: 234758137
Test: SessionLifecycleTest#testSaveRemainsWhenAutofilledAppIsKilled
Change-Id: I9841509c33ebf8b1d068958bb4b2dd33b51ebbfa
1 file changed