Fix info leak vulnerability of IDrm

bug: 26323455
Change-Id: I25bb30d3666ab38d5150496375ed2f55ecb23ba8

 void readVector(Parcel &reply, Vector<uint8_t> &vector) const {
 uint32_t size = reply.readInt32();
 vector.insertAt((size_t)0, size);
        reply.read(vector.editArray(), size);
 }

 void readVector(Parcel &reply, Vector<uint8_t> &vector) const {
 uint32_t size = reply.readInt32();
 vector.insertAt((size_t)0, size);
        reply.read(vector.editArray(), size);
 }
