Enforce cross-uid touch pass-though opt-in

This CL requires apps to opt-in to cross-uid touch pass-through via the
newly added APIs. Without opt-in, pass-through touches are blocked if
the app's target SDK version is 36 or above.

Bug: 358129114
Test: WindowUntrustedTouchTest
Flag: com.android.window.flags.touch_pass_through_opt_in
Change-Id: Iec306b6be2969e3cf0da8b7082f5dc5a6e19bdb9
5 files changed