🙅 Bind a WebAPK to its "host" browser.

web_apks/minting_example/AndroidManifest.xml

Index: web_apks/minting_example/AndroidManifest.xml
diff --git a/web_apks/minting_example/AndroidManifest.xml b/web_apks/minting_example/AndroidManifest.xml
index 728ba33adbec4533bb180aa57bacef5eee89b233..e1cb8a8bf590377f57ccd6b816c52b4ca9637293 100644
--- a/web_apks/minting_example/AndroidManifest.xml
+++ b/web_apks/minting_example/AndroidManifest.xml
@@ -34,6 +34,7 @@
                 <data android:scheme="https" android:host="{{ scope_url_host }}" android:pathPrefix=""></data>
             </intent-filter>
         </activity>
+        <meta-data android:name="runtimeHost" android:value="{{ runtime_host }}" />
         <meta-data android:name="hostUrl" android:value="{{ host_url }}" />
         <meta-data android:name="mac" android:value="{{ mac }}" />
         <meta-data android:name="scope" android:value="{{ scope }}" />