Enable VR DFM conditional install for DD-ready devices

The CL uses the new 'conditional modules' feature to auto-install the
VR DFM upon updating Chrome on supported devices. This should provide a
much better experience when launching Chrome from the DDH for the first
time on devices where the cost of having the VR DFM unused is minimal.

Bug: 961796
Change-Id: I7fe1bf9ac06397fe37c1e9a099005f20d68aa267
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1668148Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Will Cassella <cassew@google.com>
Cr-Commit-Position: refs/heads/master@{#676107}

chrome/android/features/vr/java/AndroidManifest.xml

@@ -8,9 +8,17 @@
     featureSplit="vr">
 
     <dist:module
-        dist:onDemand="true"
-        dist:title="@string/vr_module_title">
-        <dist:fusing dist:include="false" />
+      dist:instant="false"
+      dist:title="@string/vr_module_title">
+      <dist:fusing dist:include="false" />
+      <dist:delivery>
+        <dist:install-time>
+          <dist:conditions>
+            <dist:device-feature dist:name="android.hardware.vr.high_performance" />
+          </dist:conditions>
+        </dist:install-time>
+        <dist:on-demand />
+      </dist:delivery>
     </dist:module>
 
     <application>