Fix CTS failures on the devices with per-display-focus enabled.

- Disables testKeyReceiving(), testPointerCapture() since tapping on a display
  will not move the focus.
- Consolidates the checking condition with assumeFalse().

Bug: 133323637
Test: atest CtsWindowManagerDeviceTestCases:WindowFocusTests
Change-Id: I85bfc82fe5637f734da342c196b3cf4d2af1f717
1 file changed