AudioFlinger: PatchPanel: prioritize quality vs latency for FM Bridge

When a SwBridge is created, the default behavior is to start playback as
soon as possible, prioritizing the lowest strategy vs quality (potential
glitches).

This CL prevents this behavior for FM Tuner input devices if no fast mixer
and fast capture are used.

Signed-off-by: Francois Gaffie <francois.gaffie@renault.com>
Change-Id: I24cfb97d09518be4ab15775d8575957a220c25dc