Surfaceflinger: rename PhaseOffsets to VsyncConfiguration

Renaming for easier diff with upcoming CLs.

Test: boot
Bug: 162888874
Change-Id: I38b6b3675e3a6ca8ad2a8ac66d8566930779c08e
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index e452187..e341af1 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -169,7 +169,6 @@
         "Scheduler/LayerInfo.cpp",
         "Scheduler/LayerInfoV2.cpp",
         "Scheduler/MessageQueue.cpp",
-        "Scheduler/PhaseOffsets.cpp",
         "Scheduler/RefreshRateConfigs.cpp",
         "Scheduler/Scheduler.cpp",
         "Scheduler/SchedulerUtils.cpp",
@@ -178,6 +177,7 @@
         "Scheduler/VSyncPredictor.cpp",
         "Scheduler/VsyncModulator.cpp",
         "Scheduler/VSyncReactor.cpp",
+        "Scheduler/VsyncConfiguration.cpp",
         "StartPropertySetThread.cpp",
         "SurfaceFlinger.cpp",
         "SurfaceFlingerDefaultFactory.cpp",