Don't blur too many layers

An application requesting lots and lots of blurs:
a. Enables pixel stealing by measuring how long it takes to perform a
blur across windows
b. Probably isn't very valid anyways.

So, just arbitrarily pick an upper bound for blur requests that a
display is allowed to manage (10), and disable everything else.
Arbitrarily, pick the 10 "front-most" blurs to be respected.

Bug: 399120953
Flag: EXEMPT security
Test: Security PoC no longer PoCs
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:acf65e7b90c8313b3cf939d14b8299818d77cc18)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:63bb5e1c89ff74d1eb6725029769d00706a31857)
Merged-In: Ie7195eb852b52aff2f58da8bd095d8684baceef6
Change-Id: Ie7195eb852b52aff2f58da8bd095d8684baceef6

• services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h[diff]
• services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h[diff]
• services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h[diff]
• services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/CachedSet.h[diff]
• services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h[diff]
• services/surfaceflinger/CompositionEngine/src/Output.cpp[diff]
• services/surfaceflinger/CompositionEngine/src/planner/CachedSet.cpp[diff]
• services/surfaceflinger/CompositionEngine/tests/planner/CachedSetTest.cpp[diff]