SurfaceFlinger: no touch boost for layer that explicitly voted

Avoid switching to peak refresh rate on touch when we have
layers that explicitly voted via setFrateRate() and they occupy > 80%
of the screen.

Test: App that calls to setFrameRate + touch
Test: adb shell /data/nativetest64/libsurfaceflinger_unittest/libsurfaceflinger_unittest
Bug: 147516364
Fixes: 150976355
Change-Id: I3590beeba1c3ff4c9a1b1575a607ef949ca6dd10