Error fix from enabling Clang thread-safety checks in aosp_panther

Parent bug: b/353324127. Enabling `thread-safety-reference-return`
to allow developers to utilize Clang thread safety guardrails
(GUARDED_BY, REQUIRES, EXCLUDES).

Added NO_THREAD_SAFETY_ANALYSIS annotations to violating functions.
If this is not desired, please respond with concerns
or preferred fix.

Bug: 354740314
Test: lunch aosp_panther_hwasan-trunk_staging-userdebug && m out/soong/.intermediates/frameworks/native/services/surfaceflinger/tests/unittests/libsurfaceflinger_unittest/android_arm64_armv8-2a_cortex-a55_hwasan/obj/frameworks/native/services/surfaceflinger/tests/unittests/RefreshRateSelectorTest.o
Change-Id: Iaad37f1eee5837ac79ea0551124eca060ff5d514