Avoid strictmode.DiskReadViolation in AR initialization

ARCore's checkAvailability reads shared preferences via ArCoreContentProvider, need to
turn off strict mode to avoid failing tests that run with enforcement enabled by
default.

Bug: 1015597
Change-Id: I55023029673498455fd673185ed9153be0af5148
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1874826Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Reviewed-by: Piotr Bialecki <bialpio@chromium.org>
Commit-Queue: Klaus Weidner <klausw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708687}

chrome/android/java/src/org/chromium/chrome/browser/vr/ArCoreShimImpl.java

@@ -9,6 +9,7 @@ import android.content.Context;
 
 import com.google.ar.core.ArCoreApk;
 
+import org.chromium.base.StrictModeContext;
 import org.chromium.base.annotations.UsedByReflection;
 import org.chromium.chrome.browser.vr.ArCoreShim.Availability;
 import org.chromium.chrome.browser.vr.ArCoreShim.InstallStatus;
@@ -35,9 +36,13 @@ class ArCoreShimImpl implements ArCoreShim {
 
     @Override
     public @Availability int checkAvailability(Context applicationContext) {
-        ArCoreApk.Availability availability =
-                ArCoreApk.getInstance().checkAvailability(applicationContext);
-        return mapArCoreApkAvailability(availability);
+        // ARCore's checkAvailability reads shared preferences via ArCoreContentProvider, need to
+        // turn off strict mode to allow that.
+        try (StrictModeContext ignored = StrictModeContext.allowDiskReads()) {
+            ArCoreApk.Availability availability =
+                    ArCoreApk.getInstance().checkAvailability(applicationContext);
+            return mapArCoreApkAvailability(availability);
+        }
     }
 
     private @InstallStatus int mapArCoreApkInstallStatus(ArCoreApk.InstallStatus installStatus) {