Merge "avoid 32-bit integer overflow" into oc-dev

        CHECK(mOutputFormat->findInt32("channel-count", &channelCount));

        CHECK(mOutputFormat->findInt32("sample-rate", &sampleRate));

        if (mSampleRate != 0 && sampleRate != 0) {

            mEncoderDelay = mEncoderDelay * sampleRate / mSampleRate;

            mEncoderPadding = mEncoderPadding * sampleRate / mSampleRate;

            // avoiding 32-bit overflows in intermediate values

            mEncoderDelay = (int32_t)((((int64_t)mEncoderDelay) * sampleRate) / mSampleRate);

            mEncoderPadding = (int32_t)((((int64_t)mEncoderPadding) * sampleRate) / mSampleRate);

            mSampleRate = sampleRate;

        }

        if (mSkipCutBuffer != NULL) {