Add deviceGoingToSleep param to WindowWakeUpPolicy delegate

We are adding this param to allow wake up delegates to decide
to potentially ignore a wake up event that they think happened
unintentionally. An example is a Wear OS device, where an unintended
touch of the rotary input during a palm-screen-off event may negate
the screen-off sequence.

Bug: 400790919
Test: atest WindowWakeUpPolicyTests
Flag: EXEMPT param addition only, trivial
Change-Id: I4ef3c8a3178b3bf7c4e2b60b9fe41ba32cbd0102