Move android-all generations to /external/robolectric

Bug: 314757990
Test: CI
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:ac7c5eaf9c1c184b6f952f6a12a46ce41d5186a7)
Merged-In: Iced0415d38cba5e4264b57b257f59ef337b6990c
Change-Id: Iced0415d38cba5e4264b57b257f59ef337b6990c
1 file changed
tree: 25a437ffc2552ed2baec46a51d9bf9daf6f4126a
  1. plugins/
  2. resources/
  3. Android.bp