Remove TODOs for adding CTS tests.

Bug: 232341407
Bug: 232845902
Test: atest KeyboardVisibilityControlTest#testHideImeAfterBackPressed_ScreenOffOn --no-bazel-mode
Test: atest KeyboardVisibilityControlTest#testNonImeFocusablePopupWindow_onTopOfIme --no-bazel-mode

Change-Id: I36ce1846b6f1cfdbb8a9679306966a205842b3ff
2 files changed