Fix initialization of AAC presentation struct

Otherwise the new size checks trip on this.

Bug: 27207275
Change-Id: I1f8f01097e3a88ff041b69279a6121be842f1766

void ACodec::deferMessage(const sp<AMessage> &msg) {
    mDeferredQueue.push_back(msg);
}

void ACodec::deferMessage(const sp<AMessage> &msg) {
    mDeferredQueue.push_back(msg);
}
