stagefright: limit default max-input-size for AVC

AVC has a compression ratio of at least 2.  Account for this, as
some codecs refuse exorbitant max-input-size requests.

Change-Id: Ib68b485879ba33a12a486f2ce18fe100be977699
Signed-off-by: Lajos Molnar <lajos@google.com>
Bug: 11599364
1 file changed