hwc: Set refresh rate during idlefallback for unhandled cases

In cases where the frame before idlefallback gets composed
by gpu ( due to smaller dirty region,  multiple invalidates by
PP daemon for LUT convergence, etc) set refresh rate to
minfps supported by panel as part of idlefallback timeout handler.

Change-Id: I3c3c50327939d3b14f1714cf80a6981a454a472a
1 file changed