[QRCode Android] QR code background always white

Bug: 1086565
Change-Id: I7f13079b352c09cab272566aaf498d58d72d5540
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2218527Reviewed-by: Travis Skare <skare@chromium.org>
Commit-Queue: Gayane Petrosyan <gayane@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772343}

chrome/browser/share/android/java/res/drawable/qrcode_background.xml

@@ -6,6 +6,7 @@
 	xmlns:android="http://schemas.android.com/apk/res/android"
 	android:shape="rectangle">
     <size android:height="248dp" android:width="248dp" />
+    <solid android:color="@color/modern_white" />
     <stroke android:width="@dimen/chip_border_width" android:color="@color/modern_grey_200" />
     <corners android:radius="@dimen/chip_corner_radius" />
 </shape>
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