Use BIND_INCLUDE_CAPABILITIES for SoundTriggerService

SoundTriggerService is used by Now Playing to read DSP audio.  Now that audio permissions are gated on process capability, we need this flag for system server to pass on its capability during the bind.  With the new capability, permissions will no longer be denied.

Bug: 150508177
Fixes: 150508177
Test: todo
Change-Id: I79a18a9c98e5f36000f329bf15ca5a5f73826ffe