Add an interface to query the current frame rate from SmoMo, which is
based on its internal state.
CRs-Fixed: 2667026
Change-Id: Ia0b7305124c72e548dc7c935ab5b717945fbc7c2
Add version information in SmoMo interface to make sure the
API of clients and SmoMo implementation are compatible. Also
add buffer dequeue duration in SmoMo interface which is used
to update SmoMo internal states.
Change-Id: I65cf2cdb8afedb45d6576d4931e4d074b8b2f7f4