Support --extra-manifest-application-arguments in webview and service_only

Author: dbnicholson

doc/source/buildoptions.rst

@@ -168,6 +168,8 @@ ready.
   access. Defaults to 5000.
 - ``--extra-manifest-xml``: Extra xml to write directly inside the
   ``<manifest>`` element of AndroidManifest.xml.
+- ``--extra-manifest-application-arguments``: Extra arguments to be
+  added to the ``<manifest><application>`` tag of AndroidManifest.xml.
 - ``--manifest-placeholders``: Inject build variables into the manifest
   via the ``manifestPlaceholders`` property.
 - ``--enable-google-services``: Enable the Google Services Gradle plugin.

pythonforandroid/bootstraps/service_only/build/templates/AndroidManifest.tmpl.xml

@@ -53,7 +53,9 @@
                  {% if args.backup_rules %}android:fullBackupContent="@xml/{{ args.backup_rules }}"{% endif %}
                  android:theme="{{args.android_apptheme}}{% if not args.window %}.Fullscreen{% endif %}"
                  android:hardwareAccelerated="true"
-                 android:extractNativeLibs="true" >
+                 android:extractNativeLibs="true"
+                 {{ args.extra_manifest_application_arguments }}
+                 >
         {% for l in args.android_used_libs %}
         <uses-library android:name="{{ l }}" />
         {% endfor %}

pythonforandroid/bootstraps/webview/build/templates/AndroidManifest.tmpl.xml

@@ -56,6 +56,7 @@
                  android:usesCleartextTraffic="true"
                  android:extractNativeLibs="true"
                  {% if debug %}android:debuggable="true"{% endif %}
+                 {{ args.extra_manifest_application_arguments }}
                  >
         {% for l in args.android_used_libs %}
         <uses-library android:name="{{ l }}" />