Fix code triggering [-Werror, -Wreorder].

Otherwise, it will be a build error once we turn on the error.
Sponge: https://sponge.corp.google.com/target?id=8e88bd90-a716-40f7-9599-b70e9193b297&target=//third_party/java_src/android_libs/exoplayer/v2/extensions/flac/src/main:binary.
PiperOrigin-RevId: 276461029

extensions/flac/src/main/jni/flac_parser.cc

@@ -265,11 +265,11 @@ FLACParser::FLACParser(DataSource *source)
     : mDataSource(source),
       mCopy(copyTrespass),
       mDecoder(NULL),
-      mSeekTable(NULL),
-      firstFrameOffset(0LL),
       mCurrentPos(0LL),
       mEOF(false),
       mStreamInfoValid(false),
+      mSeekTable(NULL),
+      firstFrameOffset(0LL),
       mVorbisCommentsValid(false),
       mPicturesValid(false),
       mWriteRequested(false),