ci: Draft android releases (#7596)

Adds a release drafter template for the android client.

refs #3321

.github/release-drafter-android-client.yml

@@ -0,0 +1,5 @@
+tag-prefix: "android-client-"
+template: >
+  Please see our
+  [changelog](https://www.firezone.dev/changelog?utm_source=github-releases)
+  for more details.

.github/workflows/ci.yml

@@ -58,6 +58,9 @@ jobs:
           # mark:next-apple-version
           - release_name: macos-client-1.4.0
             config_name: release-drafter-macos-client.yml
+          # mark:next-android-version
+          - release_name: android-client-1.4.0
+            config_name: release-drafter-android-client.yml
 
     steps:
       - uses: release-drafter/release-drafter@v6