Avoid vsync enabled when in DOZE mode (AOD).

Bug: 219109873
Test: perfetto trace
Change-Id: Id3373dc9bb0cf4c0375c79a32ca9802fd77e06c2
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index 0e15a7c..f9c9434 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -454,6 +454,8 @@
         std::mutex vsyncEnabledLock;
         hal::Vsync vsyncEnabled GUARDED_BY(vsyncEnabledLock) = hal::Vsync::DISABLE;
 
+        hal::PowerMode powerMode = hal::PowerMode::ON;
+
         nsecs_t lastHwVsync = 0;
     };