Create shared timeline data structure and unit test cases

This change adds the necessary classes for the graphics shared timeline.

Bug: 162889810
Test: libsurfaceflinger_unittest --gtest_filter='FrameTimelineTest*'
Change-Id: I7310a8e0793b2d640d873814bb5a9ba83c76a196
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index b039f6e..5299a37 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -68,6 +68,7 @@
     },
     static_libs: [
         "libcompositionengine",
+        "libframetimeline",
         "libperfetto_client_experimental",
         "librenderengine",
         "libserviceutils",