audioflinger: fix duplicating track sampling rate

Add missing initialization of client proxy sampling rate
and volumes in OutputTrack constructor.

Bug: 8687522
Change-Id: I813e700315bb97083a63dd32279f1998ac775483
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index a6ab4f8..5ac3129 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -1415,6 +1415,9 @@
         // since client and server are in the same process,
         // the buffer has the same virtual address on both sides
         mClientProxy = new AudioTrackClientProxy(mCblk, mBuffer, mFrameCount, mFrameSize);
+        mClientProxy->setVolumeLR((uint32_t(uint16_t(0x1000)) << 16) | uint16_t(0x1000));
+        mClientProxy->setSendLevel(0.0);
+        mClientProxy->setSampleRate(sampleRate);
     } else {
         ALOGW("Error creating output track on thread %p", playbackThread);
     }