Fix downcast that was using reinterpret_cast instead of static_cast

Test: compile
Bug: 68099072
Change-Id: Ic44941862672f4baaf0743f1df1375444d4226a2
Signed-off-by: Kevin Rocard <krocard@google.com>
diff --git a/media/libaudioprocessing/AudioMixer.cpp b/media/libaudioprocessing/AudioMixer.cpp
index 238925d..3e72c89 100644
--- a/media/libaudioprocessing/AudioMixer.cpp
+++ b/media/libaudioprocessing/AudioMixer.cpp
@@ -813,7 +813,7 @@
                 mMixerInFormat, sampleRate, playbackRate);
         reconfigureBufferProviders();
     } else {
-        reinterpret_cast<TimestretchBufferProvider*>(mTimestretchBufferProvider)
+        static_cast<TimestretchBufferProvider*>(mTimestretchBufferProvider)
                 ->setPlaybackRate(playbackRate);
     }
     return true;