Transform transparentRegion into output space

Although "outputSpaceBlockingRegionHint" claims to be in the output
space, unlike "outputSpaceVisibleRegion", we never transformed it to the
output space. This meant that HWC did not know how to apply it properly
when the device was rotated. Fix this.

Add outputSpaceBlockingRegionHint to the dumpsys.

Fixes: 224484888
Test: libcompositionengine_test
Change-Id: I1378c96f4d5af57fb7d9835182427017064e89e5