Support .supportedModes to enable newer tests

tests/wpt/mozilla/meta/MANIFEST.json

@@ -14609,21 +14609,21 @@
    },
    "webxr": {
     "create_session.html": [
-     "af76c5a812d7d05a0158194560933def3fbdb9f9",
+     "5b5d485b372bfffb22204bc162c9e182306395cb",
      [
       null,
       {}
      ]
     ],
     "layers.html": [
-     "31f4b6bd51cfcca47666331857bd2bbdf84d2f5e",
+     "49821d7661f92bc9cf22232d3fcb391c2cdc7295",
      [
       null,
       {}
      ]
     ],
     "obtain_frame.html": [
-     "74fda5bad43e8ea95552e65380e83952680e8469",
+     "d9ff25729f9cdfd348e7c9914ce2dacd231e13a0",
      [
       null,
       {}

tests/wpt/mozilla/tests/webxr/create_session.html

@@ -8,7 +8,7 @@
         <script>
           async_test(function(t) {
               navigator.xr.test.simulateDeviceConnection({
-              supportsImmersive: true,
+              supportedModes: ["immersive-vr"],
               views: TEST_VIEWS,
               viewerOrigin: {position: [0.5, 0.1, 0.1], orientation: [1, 0, 0, 1] }
             }).then((m) => {

tests/wpt/mozilla/tests/webxr/layers.html

@@ -12,7 +12,7 @@
           let gl = canvas.getContext('webgl');
           promise_test(async function() {
             let mock = await navigator.xr.test.simulateDeviceConnection({
-              supportsImmersive: true,
+              supportedModes: ["immersive-vr"],
               views: TEST_VIEWS,
               viewerOrigin: {position: [0.5, 0.1, 0.1], orientation: [1, 0, 0, 1] }
             });

tests/wpt/mozilla/tests/webxr/obtain_frame.html

@@ -12,7 +12,7 @@
           let gl = canvas.getContext('webgl');
           promise_test(async function() {
             let mock = await navigator.xr.test.simulateDeviceConnection({
-              supportsImmersive: true,
+              supportedModes: ["immersive-vr"],
               views: TEST_VIEWS,
               viewerOrigin: {position: [0.5, 0.1, 0.1], orientation: [1, 0, 0, 1] }
             });