Update the AndroidManifest to enable access to Oculus OpenXR runtime.

platform/android/export/export_plugin.cpp

@@ -977,6 +977,11 @@ void EditorExportPlatformAndroid::_fix_manifest(const Ref<EditorExportPreset> &p
 					Vector<int> feature_versions;
 
 					if (xr_mode_index == 1 /* XRMode.OVR */) {
+						// Set degrees of freedom
+						feature_names.push_back("android.hardware.vr.headtracking");
+						feature_required_list.push_back(true);
+						feature_versions.push_back(1);
+
 						// Check for hand tracking
 						int hand_tracking_index = p_preset->get("xr_features/hand_tracking"); // 0: none, 1: optional, 2: required
 						if (hand_tracking_index > 0) {

platform/android/export/gradle_export_util.cpp

@@ -197,6 +197,8 @@ String _get_xr_features_tag(const Ref<EditorExportPreset> &p_preset) {
 	String manifest_xr_features;
 	bool uses_xr = (int)(p_preset->get("xr_features/xr_mode")) == 1;
 	if (uses_xr) {
+		manifest_xr_features += "    <uses-feature tools:node=\"replace\" android:name=\"android.hardware.vr.headtracking\" android:required=\"true\" android:version=\"1\" />\n";
+
 		int hand_tracking_index = p_preset->get("xr_features/hand_tracking"); // 0: none, 1: optional, 2: required
 		if (hand_tracking_index == 1) {
 			manifest_xr_features += "    <uses-feature tools:node=\"replace\" android:name=\"oculus.software.handtracking\" android:required=\"false\" />\n";
@@ -228,7 +230,9 @@ String _get_activity_tag(const Ref<EditorExportPreset> &p_preset) {
 			"tools:replace=\"android:screenOrientation\" "
 			"android:screenOrientation=\"%s\">\n",
 			orientation);
-	if (!uses_xr) {
+	if (uses_xr) {
+		manifest_activity_text += "            <meta-data tools:node=\"replace\" android:name=\"com.oculus.vr.focusaware\" android:value=\"true\" />\n";
+	} else {
 		manifest_activity_text += "            <meta-data tools:node=\"remove\" android:name=\"com.oculus.vr.focusaware\" />\n";
 	}
 	manifest_activity_text += "        </activity>\n";

platform/android/java/app/AndroidManifest.xml

@@ -49,6 +49,10 @@
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
+
+                <!-- Enable access to OpenXR on Oculus mobile devices, no-op on other Android
+                platforms. -->
+                <category android:name="com.oculus.intent.category.VR" />
             </intent-filter>
         </activity>