DO NOT MERGE - libstagefright: check requested memory size before allocation for SoftMPEG4Encoder and SoftVPXEncoder. am: 0462975291 am: 3e8e134597  -s ours am: e4223a8d32
am: bed81d6594

* commit 'bed81d6594f26cb86c542d61fa65130f3f898b1b':
  DO NOT MERGE - libstagefright: check requested memory size before allocation for SoftMPEG4Encoder and SoftVPXEncoder.