Add a system TextToSpeech implementation that initiates the connection through the system server.

    This change includes the new System Service that allows the supervised binding to the TextToSpeech service provider.
    It proxies the binding process from the client instead of the direct client -> texttospeech connection.

Bug: 178112052
Test: atest CtsSpeechTestCases
Test: forest apct/device_boot_health_check
Change-Id: I0709e71460fa01ab025c92753a20bce38f562845
11 files changed