Update Dialer source to latest internal Google revision.

Previously, Android's Dialer app was developed in an internal Google
source control system and only exported to public during AOSP drops.

The Dialer team is now switching to a public development model similar
to the telephony team.

This CL represents all internal Google changes that were committed to
Dialer between the public O release and today's tip of tree on internal
master. This CL squashes those changes into a single commit.
In subsequent changes, changes will be exported on a per-commit basis.

(cherry picked from commit 2ca4318cc1ee57dda907ba2069bd61d162b1baef
and amended to match paths of dependencies under
prebuilts/maven_repo/bumptech/com/github/bumptech/glide/.)

This CL was generated using these commands from a repository at
stage-stage-master at revision ea7b4dc89590ffa3332766a531e0eab6ffb9aebd
("Merge "Update Dialer source to latest internal Google revision." am: c39ea3c55f -s ours"):

  git diff --binary 2ca4318cc1ee57dda907ba2069bd61d162b1baef | git apply -R --index
  git commit -c 2ca4318cc1ee57dda907ba2069bd61d162b1baef

Test: make, flash install, run
Change-Id: I529aaeb88535b9533c0ae4ef4e6c1222d4e0f1c8
PiperOrigin-RevId: 167068436
diff --git a/CONTRIBUTING b/CONTRIBUTING
new file mode 100644
index 0000000..2827b7d
--- /dev/null
+++ b/CONTRIBUTING
@@ -0,0 +1,27 @@
+Want to contribute? Great! First, read this page (including the small print at the end).
+
+### Before you contribute
+Before we can use your code, you must sign the
+[Google Individual Contributor License Agreement]
+(https://cla.developers.google.com/about/google-individual)
+(CLA), which you can do online. The CLA is necessary mainly because you own the
+copyright to your changes, even after your contribution becomes part of our
+codebase, so we need your permission to use and distribute your code. We also
+need to be sure of various other things—for instance that you'll tell us if you
+know that your code infringes on other people's patents. You don't have to sign
+the CLA until after you've submitted your code for review and a member has
+approved it, but you must do it before we can put your code into our codebase.
+Before you start working on a larger contribution, you should get in touch with
+us first through the issue tracker with your idea so that we can help out and
+possibly guide you. Coordinating up front makes it much easier to avoid
+frustration later on.
+
+### Code reviews
+All submissions, including submissions by project members, require review. We
+use Github pull requests for this purpose.
+
+### The small print
+Contributions made by corporations are covered by a different agreement than
+the one above, the
+[Software Grant and Corporate Contributor License Agreement]
+(https://cla.developers.google.com/about/google-corporate).