Allows an app to cancel a device state request they made at any point if they're in the foreground.

Merges cl 28368952 & 28785068 that allows the updated behavior
for cancelling a device state request for a request that the caller
made themselves with a requirement that the caller must still be
in the foreground, to be cherry-picked to 24Q3-release.

Bug: 350930205
Bug: 354772125
Test: DeviceStateManagerTests
Test: ExtensionRearDisplayPresentationTest
Flag: android.hardware.devicestate.feature.flags.device_state_requester_cancel_state
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:ffb9832df3de57a8e29aa8eee8b85ae4e3d8ea32)
Merged-In: I864716078d377b2c65cfccf518b2f81f2d043efc
Change-Id: I864716078d377b2c65cfccf518b2f81f2d043efc