SurfaceFlinger: throttle applications based on uid

Add the ability for SurfaceFlinger to be able to throttle down to
a divider of the refresh rate (i.e. for 30/45 for 90Hz)

Change-Id: I6bfd6f43ee1f30e771a136c558d8ae9a6d7fbe0f
Test: Manually via 1039 SF backdoor
Bug: 170502573
Bug: 169270763
Bug: 169271059
diff --git a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
index 1e5139c..0af5f30 100644
--- a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
@@ -52,6 +52,7 @@
     void setPeriod(nsecs_t) final {}
     void resetModel() final {}
     bool needsMoreSamples() const final { return false; }
+    bool isVSyncInPhase(nsecs_t, int) const final { return false; }
     void dump(std::string&) const final {}
 
 private:
@@ -88,6 +89,7 @@
     void setPeriod(nsecs_t) final {}
     void resetModel() final {}
     bool needsMoreSamples() const final { return false; }
+    bool isVSyncInPhase(nsecs_t, int) const final { return false; }
     void dump(std::string&) const final {}
 
 private: