Added new field (+setter and getter) to SynthesisRequest with Uid of a calling process. TTS service will be able to discover packages names associated with caller using PackageManager.getPackagesForUid. This will allow to block buggy or poorly designed programs from an unintentional DDoS attacks against TTS service. Bug: 8625440 Change-Id: I5ac0ea191f952495c00301f17efdf28205353ae4