Allow TRANSFER_OBTAIN to be used for fast tracks

Change-Id: I8fa20c26f076567b38210af4a680fe1cb2eacee4
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 720db17..0ad9cc0 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -1002,7 +1002,9 @@
             // use case 1: shared buffer
             (mSharedBuffer != 0) ||
             // use case 2: callback transfer mode
-            (mTransfer == TRANSFER_CALLBACK)) &&
+            (mTransfer == TRANSFER_CALLBACK) ||
+            // use case 3: obtain/release mode
+            (mTransfer == TRANSFER_OBTAIN)) &&
             // matching sample rate
             (mSampleRate == afSampleRate))) {
         ALOGW("AUDIO_OUTPUT_FLAG_FAST denied by client");