[automerger skipped] Use percentage scaling for overview thumbnail size am: 992db75dae -s ours

am skip reason: Merged-In Id04871464bdb3ef2d6b046977b0ffd9bd51bc230 with SHA-1 4f7952ead4 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16389090

Change-Id: If737116ecabc2cfd992391846b572d8e73c3993e