Squashed commit of the following:

Squashed commit of the following:

commit 4abf16bb04dc9695fedf4007a84f903074312ccd
Author: Andreas Huber <andih@google.com>
Date:   Tue Jul 20 09:21:17 2010 -0700

    Support a single format change at the beginning of audio playback. This way the AAC+ decoder may change its output format from what is originally encoded in the audio stream and we'll still play it back correctly.

    Change-Id: Icc790122744745e9a88099788d4818ca1e265a82
    related-to-bug: 2826841

commit 09c74da63e6ad5cb5dafb70f62696d75d2978967
Author: James Dong <jdong@google.com>
Date:   Sun Jul 18 17:57:01 2010 -0700

    Fix MPEG4Extractor to extract sampling frequency correctly when SBR is enabled.

    Change-Id: I883c81dad3ea465e71cb5590e89d763671a90ff8

commit f672bf2a782dc7d5fb6325d611a7fe17045dfe9a
Author: James Dong <jdong@google.com>
Date:   Thu Jul 8 20:56:13 2010 -0700

    Enable the support for decoding audio with AAC+ and eAAC+ features

    bug - 282684

    Change-Id: I73c8377af3cc4edd3ee7cea86dc3b1c369fbd78b

Change-Id: I012f1179e933b6d1345d2368f357576c722485f7