DO NOT MERGE - libstagefright: check requested memory size before allocation for SoftMPEG4Encoder and SoftVPXEncoder. am: 6afc659b00 am: 9e1d7751b1  -s ours am: 4c0d243626 am: 862b693ba3  -s ours am: db76a879ea am: e0c9d8afd0 am: 2048dd5483  -s ours am: 7a2dbcd38b am: f766fdb625
am: 29ff7f2ac7

* commit '29ff7f2ac7af5499dbbd6670b981251212831b60':
  DO NOT MERGE - libstagefright: check requested memory size before allocation for SoftMPEG4Encoder and SoftVPXEncoder.