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

Author: eprucka3

services/surfaceflinger/tests/unittests/RefreshRateSelectorTest.cpp

@@ -100,7 +100,9 @@ struct TestableRefreshRateSelector : RefreshRateSelector {
     const std::vector<Fps>& knownFrameRates() const { return mKnownFrameRates; }
 
     using RefreshRateSelector::GetRankedFrameRatesCache;
-    auto& mutableGetRankedRefreshRatesCache() { return mGetRankedFrameRatesCache; }
+    auto& mutableGetRankedRefreshRatesCache() NO_THREAD_SAFETY_ANALYSIS {
+        return mGetRankedFrameRatesCache;
+    }
 
     auto getRankedFrameRates(const std::vector<LayerRequirement>& layers,
                              GlobalSignals signals = {}, Fps pacesetterFps = {}) const {
@@ -138,7 +140,9 @@ struct TestableRefreshRateSelector : RefreshRateSelector {
         return setPolicy(policy);
     }
 
-    const auto& getPrimaryFrameRates() const { return mPrimaryFrameRates; }
+    const auto& getPrimaryFrameRates() const NO_THREAD_SAFETY_ANALYSIS {
+        return mPrimaryFrameRates;
+    }
 };
 
 class RefreshRateSelectorTest : public testing::TestWithParam<Config::FrameRateOverride> {