Tapping inside an EditText should always pop up the IME.

Bug 3374062

When the tap in slightly off the EditText, it receives focus from its parent layout
which dispatches the event. However, the touch event is (correctly) not propagated
in that case.

onFocusChanged should hence do actions similar to what is done on touch up events.

Change-Id: Ia5c04546674fc6239aa4d0b8d051f4951ca91352