Update of names of branches and targets for trunk stable.

Remove the implementation lib source for armv7, because there are no
longer any CI build for it.

This changes the command line flags. There should be no reason to keep
the old flags.

Test: prebuilts/runtime/mainline/update.py --aosp-main-build 10940468 \
        --aosp-main-throttled-build 10940741
Bug: 308859714
Change-Id: I7dd4f241f3e34396470dd2f780909726d01f1407
3 files changed