Reuse more upload_to_android and allow removing flag on Android

Bug: skia:
Change-Id: I8c84b63d01ead32bf4aa71550f6fa84ddfcf480f
Reviewed-on: https://skia-review.googlesource.com/63743
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Yuqian Li <liyuqian@google.com>
2 files changed