Add simple cts tests for ActionMode.

Added tests for
ActionMode#getTitleOptionalHint
ActionMode#setTitleOptionalHint
ActionMode#getTag
ActionMode#isTitleOptional
ActionMode#isUiFocusable
ActionMode#hide
ActionMode#onWindowFocusChanged

Bug: 21668154
Change-Id: If57989f5b4da6ee3b0ed522fda443efec0286ba1
1 file changed