Add ATRACE_TAG_RS.

#define ATRACE_TAG_APP              (1<<12)

#define ATRACE_TAG_RESOURCES        (1<<13)

#define ATRACE_TAG_DALVIK           (1<<14)

#define ATRACE_TAG_LAST             ATRACE_TAG_DALVIK

#define ATRACE_TAG_RS               (1<<15)

#define ATRACE_TAG_LAST             ATRACE_TAG_RS

// Reserved for initialization.

#define ATRACE_TAG_NOT_READY        (1LL<<63)