LTS Refresh: Merge upto 440b25e0098485dd1971331e86e5483fc2367f8c (buildnumber: 17800.519.0) from main-R109-cos-6.1 to release-R109-cos-6.1.

Additionally makes sure the release branch matches the main branch
exactly.

BUG=b/411674889
TEST=presubmit
RELEASE_NOTE=LTS Refresh from main-R109-cos-6.1 to release-R109-cos-6.1

Change-Id: I2acf68148354bf5966fd2cd8e1018f52fd286112