Fix CombinationKeyTests failure

The mock context would be reset after init, add more mock enviroment to
prevent tests access wrong state or the apis which need the specific
permission.

Bug: 279233062
Test: atest CombinationKeyTests PowerKeyGestureTests ModifierShortcutTests
Change-Id: I4da8afdb45cca83ce61b92909baf41b1b9e33387
2 files changed