Motown: Use new TimelineTransform and related definitions

examples/audio_play_test/BUILD.gn

Index: examples/audio_play_test/BUILD.gn
diff --git a/examples/audio_play_test/BUILD.gn b/examples/audio_play_test/BUILD.gn
index a710e289431789dab7bae964932552b6b2a1d9cb..bda93caec71ddc9c052d45aa00886443e1773ad3 100644
--- a/examples/audio_play_test/BUILD.gn
+++ b/examples/audio_play_test/BUILD.gn
@@ -19,6 +19,7 @@ mojo_native_application("play_wav") {
     "//mojo/services/media/audio/interfaces",
     "//mojo/services/media/common/cpp",
     "//mojo/services/media/common/interfaces",
+    "//mojo/services/media/core/interfaces",
     "//mojo/services/network/interfaces",
   ]
 
@@ -34,6 +35,7 @@ mojo_native_application("play_tone") {
     "//mojo/services/media/audio/interfaces",
     "//mojo/services/media/common/cpp",
     "//mojo/services/media/common/interfaces",
+    "//mojo/services/media/core/interfaces",
   ]
 
   sources = [