Add an API to disable/restore doze settings

This adds an API to disable/restore doze settings.
This is needed by CTS in order to have a known doze
state when running certain tests.

Test: atest ActivityVisibilityTests
Test: atest InputMethodStartInputLifecycleTest

Bug: 140367074
Bug: 216182288
Change-Id: I112c37a90c5b528c4e64e18b06e57024ea277287