[Android compile server] Do not recreate mirror right after we already created it
[Android compile server] Do not recreate mirror right after we already created it

Bug: skia:8053
Change-Id: I1a32b0e1509f0466d5f85b1b854829745a1226b4
Reviewed-on: https://skia-review.googlesource.com/c/177027
Reviewed-by: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot