GitLab

This CL:
- Adds --android-deps-dir parameter to fetch_all.py This avoids having
  to place the androidx build.gradle in
  //third_party/androidx/third_party/android_deps/build.gradle
- Adds 'internalTargetVisibility' parameter to build.gradle. This will
  be used to enable //third_party/android_deps to depend on
  //third_party/androidx targets
- Removes 'depsPath' parameter in build.gradle and changes fetch_all.py
  to ignore --android-deps-dir parameter in computation of where in build
  directory DEPS is copied ot.
- Adds //third_party/android_deps to the 'ANDROID_DEPS' environment
  variable when running jetification. This fixes jetification for
  internal chrome

BUG=1064277

Change-Id: I2165846c032071315581278036bcee4ccea97262
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422518
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809196}