Surfaceflinger: rename PhaseOffsets to VsyncConfiguration

Renaming for easier diff with upcoming CLs.

Test: boot
Bug: 162888874
Change-Id: I38b6b3675e3a6ca8ad2a8ac66d8566930779c08e
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 4a59c19..7cc9cef 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -46,7 +46,6 @@
         "LayerHistoryTest.cpp",
         "LayerHistoryTestV2.cpp",
         "LayerMetadataTest.cpp",
-        "PhaseOffsetsTest.cpp",
         "PromiseTest.cpp",
         "SchedulerTest.cpp",
         "SchedulerUtilsTest.cpp",
@@ -64,6 +63,7 @@
         "VsyncModulatorTest.cpp",
         "VSyncPredictorTest.cpp",
         "VSyncReactorTest.cpp",
+        "VsyncConfigurationTest.cpp",
         "mock/DisplayHardware/MockComposer.cpp",
         "mock/DisplayHardware/MockDisplay.cpp",
         "mock/DisplayHardware/MockPowerAdvisor.cpp",