Send all of the icon URLs listed in Web Manifest to WebAPK Server.

chrome/android/webapk/shell_apk/AndroidManifest.xml

Index: chrome/android/webapk/shell_apk/AndroidManifest.xml
diff --git a/chrome/android/webapk/shell_apk/AndroidManifest.xml b/chrome/android/webapk/shell_apk/AndroidManifest.xml
index bafd1dc22c4762080fc6f0794c9fc4e77820db74..5ae93fc8afe5d43e607a68bee887e9beaef9e8fd 100644
--- a/chrome/android/webapk/shell_apk/AndroidManifest.xml
+++ b/chrome/android/webapk/shell_apk/AndroidManifest.xml
@@ -48,8 +48,7 @@
         <meta-data android:name="org.chromium.webapk.shell_apk.themeColor" android:value="{{ theme_color }}" />
         <meta-data android:name="org.chromium.webapk.shell_apk.backgroundColor" android:value="{{ background_color }}" />
         <meta-data android:name="org.chromium.webapk.shell_apk.iconId" android:resource="@mipmap/app_icon" />
-        <meta-data android:name="org.chromium.webapk.shell_apk.iconUrl" android:value="{{ icon_url }}" />
-        <meta-data android:name="org.chromium.webapk.shell_apk.iconMurmur2Hash" android:value="{{ icon_murmur2_hash }}" />
+        <meta-data android:name="org.chromium.webapk.shell_apk.iconUrlsAndIconMurmur2Hashes" android:value="{{ icon_urls_and_icon_murmur2_hashes }}" />
         <meta-data android:name="org.chromium.webapk.shell_apk.webManifestUrl" android:value="{{ web_manifest_url }}" />
         <service
             android:name="org.chromium.webapk.shell_apk.WebApkServiceFactory"