Add more downscale factors.

Add more downscale factors to allow a better granularity.

Fixes: b/189970040, b/189969749, b/189970038, b/189969782
Fixes: b/189970036, b/189969744, b/189969779, b/189969734
Test: adb shell cmd game downscale NEW_FACTOR PACKAGE_NAME
Test: atest CompatScaleTests
Test: atest CompatChangesValidConfigTest
Change-Id: I255f14aefd28fb63870935968123690971984e0c