Add CTS for SOFT_INPUT_STATE_VISIBLE

This CL	makes sure that	SOFT_INPUT_STATE_VISIBLE now requires focused
editor View to work.

TODO: Run the same test for targetSdkVersion="27" app

Bug: 69256929
Test: atest CtsInputMethodTestCases
Change-Id: I4b9f1c123260b507a7c549f75ee22bbdad10ff4b
1 file changed