Adding a Contributing file and updating the Compose snapshot

Change-Id: Ia3e3cee986d508fa88aa6d058fd88d86ff4f0935

CONTRIBUTING.md

@@ -0,0 +1,31 @@
+# How to become a contributor and submit your own code
+
+## Contributor License Agreements
+
+We'd love to accept your sample apps and patches! Before we can take them, we
+have to jump a couple of legal hurdles.
+
+Please fill out either the individual or corporate Contributor License Agreement (CLA).
+
+  * If you are an individual writing original source code and you're sure you
+    own the intellectual property, then you'll need to sign an [individual CLA](https://developers.google.com/open-source/cla/individual).
+  * If you work for a company that wants to allow you to contribute your work,
+    then you'll need to sign a [corporate CLA](https://developers.google.com/open-source/cla/corporate).
+
+Follow either of the two links above to access the appropriate CLA and
+instructions for how to sign and return it. Once we receive it, we'll be able to
+accept your pull requests.
+
+## Contributing A Patch
+
+1. Submit an issue describing your proposed change to the repo in question.
+1. The repo owner will respond to your issue promptly.
+1. If your proposed change is accepted, and you haven't already done so, sign a
+   Contributor License Agreement (see details above).
+1. Fork the desired repo, develop and test your code changes.
+1. Ensure that your code adheres to the existing style in the sample to which
+   you are contributing. Refer to the
+   [Kotlin Style Guide](https://android.github.io/kotlin-guides/style.html) for the
+   recommended coding standards for this organization.
+1. Ensure that your code has an appropriate set of unit tests which all pass.
+1. Submit a pull request.

JetNews/build.gradle.kts

@@ -34,7 +34,7 @@ buildscript {
 allprojects {
     val workdir = File("../..").absolutePath
     val externalM2RepoPath = "$workdir/androidx-master-dev/prebuilts/androidx/external"
-    val snapshotUrl = "https://ci.android.com/builds/submitted/5887420/androidx_snapshot/latest/ui/repository/"
+    val snapshotUrl = "https://ci.android.com/builds/submitted/5893476/androidx_snapshot/latest/ui/repository/"
     repositories {
         maven {
             url = uri(snapshotUrl)