stagefright: warnings be gone, some are now errors, use clang

struct ABuffer;

struct ALooper;

struct AudioTrack;

struct IGraphicBufferProducer;

class IGraphicBufferProducer;

struct MediaCodec;

struct NativeWindowWrapper;

struct NuMediaExtractor;

namespace android {

struct AString;

struct IMemory;

class IMemory;

struct ICrypto : public IInterface {

    DECLARE_META_INTERFACE(Crypto);

namespace android {

class IDataSource;

class IMediaHTTPService;

struct IMediaHTTPService;

class IMediaMetadataRetriever: public IInterface

{

class Parcel;

class Surface;

class IDataSource;

class IStreamSource;

struct IStreamSource;

class IGraphicBufferProducer;

struct IMediaHTTPService;

namespace android {

struct AMessage;

struct IMemory;

class IMemory;

struct IStreamListener;

struct IStreamSource : public IInterface {