MediaCodecList: don't return references

Bug: 16905025
Change-Id: I5b42b294f0cc785b8e4dda0e82c8f8377a46f487
diff --git a/media/libmedia/MediaCodecInfo.cpp b/media/libmedia/MediaCodecInfo.cpp
index 7900eae..5ea0519 100644
--- a/media/libmedia/MediaCodecInfo.cpp
+++ b/media/libmedia/MediaCodecInfo.cpp
@@ -46,7 +46,7 @@
     return mFlags;
 }
 
-const sp<AMessage> &MediaCodecInfo::Capabilities::getDetails() const {
+const sp<AMessage> MediaCodecInfo::Capabilities::getDetails() const {
     return mDetails;
 }
 
@@ -121,7 +121,7 @@
     }
 }
 
-const sp<MediaCodecInfo::Capabilities> &
+const sp<MediaCodecInfo::Capabilities>
 MediaCodecInfo::getCapabilitiesFor(const char *mime) const {
     ssize_t ix = getCapabilityIndex(mime);
     if (ix >= 0) {