Revert "Clamping min_sdk version to 26 since otherwise the upload will fail."
Revert "Clamping min_sdk version to 26 since otherwise the upload will fail."

This reverts commit 75522d14cce1b9eefef99915d92e12b0bce7f4c1.

That was the wrong solution to the problem.  Upping the min_sdk
version means the app can be published but it won't be available for
older devices.

google/play-work,google/play-work