SF: Adding callback to Scheduler for setting refresh rate to 60 and 90.

When device is idle, refresh rate is set to 60. When not it's set to 90.

See go/surface-flinger-scheduler for more info.

Test: All SF tests pass.
Bug: 113612090
Bug: 122347908
Change-Id: Ica6e483118db276f72d3cb4e79535303c76f99d7
diff --git a/services/surfaceflinger/Scheduler/EventThread.cpp b/services/surfaceflinger/Scheduler/EventThread.cpp
index 1683982..bf925b2 100644
--- a/services/surfaceflinger/Scheduler/EventThread.cpp
+++ b/services/surfaceflinger/Scheduler/EventThread.cpp
@@ -67,7 +67,13 @@
 }
 
 void EventThreadConnection::requestNextVsync() {
-    mEventThread->requestNextVsync(this);
+    ATRACE_NAME("requestNextVsync");
+    mEventThread->requestNextVsync(this, true);
+}
+
+void EventThreadConnection::requestNextVsyncForHWC() {
+    ATRACE_NAME("requestNextVsyncForHWC");
+    mEventThread->requestNextVsync(this, false);
 }
 
 status_t EventThreadConnection::postEvent(const DisplayEventReceiver::Event& event) {
@@ -184,16 +190,17 @@
     }
 }
 
-void EventThread::requestNextVsync(const sp<EventThreadConnection>& connection) {
-    std::lock_guard<std::mutex> lock(mMutex);
-    if (mResetIdleTimer) {
+void EventThread::requestNextVsync(const sp<EventThreadConnection>& connection, bool reset) {
+    if (mResetIdleTimer && reset) {
+        ATRACE_NAME("resetIdleTimer");
         mResetIdleTimer();
     }
-
     if (mResyncWithRateLimitCallback) {
         mResyncWithRateLimitCallback();
     }
 
+    std::lock_guard<std::mutex> lock(mMutex);
+
     if (connection->count < 0) {
         connection->count = 0;
         mCondition.notify_all();