[Android] Simplify ARCore AndroidManifest.xml logic

Chromium change:
https://github.com/chromium/chromium/commit/a028e6cec18ae19bcf6fc8684622999acaa1a774

Android: Simplify ARCore AndroidManifest.xml logic
Splits the arcore AndroidManifest.xml into two:
* One for the tags that must go in the base module
* One for InstallActivity, which can go in the chrome split

Uses mergeable_android_manifests to have the manifests added
in automatically in most cases.

This moves the AR install activity from base module and into
the chrome module, shrinking base module by 45kb.

Bug: 1426950

patches/chrome-android-java-AndroidManifest.xml.patch

@@ -1,5 +1,5 @@
 diff --git a/chrome/android/java/AndroidManifest.xml b/chrome/android/java/AndroidManifest.xml
-index 34578efef4913e5040ba1bf6c13c206360eb89db..a0d7757bdd6635deaf82cada86c718bd0540545c 100644
+index 34578efef4913e5040ba1bf6c13c206360eb89db..05cab8dda6c50d4e9121a8bfe3b9a8d5171e99d3 100644
 --- a/chrome/android/java/AndroidManifest.xml
 +++ b/chrome/android/java/AndroidManifest.xml
 @@ -28,6 +28,7 @@ by a child template that "extends" this file.
@@ -87,11 +87,3 @@ index 34578efef4913e5040ba1bf6c13c206360eb89db..a0d7757bdd6635deaf82cada86c718bd
          {% block extra_application_definitions %}
          {% endblock %}
        {% endmacro %}
-@@ -1279,6 +1295,7 @@ by a child template that "extends" this file.
-           android:value="allow_front_facing_motion_tracking_6dof," />
-       {% endblock base_application_extra_arcore_definitions %}
- 
-+        <meta-data android:name="com.google.ar.core.min_apk_version" android:value="221020000"/><activity android:name="com.google.ar.core.InstallActivity" android:configChanges="keyboardHidden|orientation|screenSize" android:excludeFromRecents="true" android:exported="false" android:launchMode="singleTop" android:theme="@android:style/Theme.Material.Light.Dialog.Alert" />
-       {% endif %}
- 
-       <!-- Cast support -->