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 7018924b0b85f499c6299b34bd83688ffa705cd9..f641ff8a9a4ab535ec853365a888c78de80a1d82 100644
--- a/chrome/android/webapk/shell_apk/AndroidManifest.xml
+++ b/chrome/android/webapk/shell_apk/AndroidManifest.xml
@@ -47,7 +47,8 @@
         <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" />

[pkotwicz, 2016/11/01 00:29:49]

Nit: rename iconId -> bestIconId

[Xi Han, 2016/11/07 16:51:43]

Done.

-        <meta-data android:name="org.chromium.webapk.shell_apk.iconUrl" android:value="{{ icon_url }}" />
+        <meta-data android:name="org.chromium.webapk.shell_apk.bestIconUrl" android:value="{{ best_icon_url }}" />
+        <meta-data android:name="org.chromium.webapk.shell_apk.iconUrls" android:value="{{ icon_urls }}" />

[pkotwicz, 2016/11/01 00:29:49]

Nit: Move this line before all of the "best" <meta-data> tags or after all of
the "best" <meta-data> tags

[Xi Han, 2016/11/07 16:51:43]

Done.

         <meta-data android:name="org.chromium.webapk.shell_apk.iconMurmur2Hash" android:value="{{ icon_murmur2_hash }}" />

[pkotwicz, 2016/11/01 00:29:49]

Nit: Rename iconMurmur2Hash -> bestIconMurmur2Hash

[Xi Han, 2016/11/07 16:51:43]

Done.

         <meta-data android:name="org.chromium.webapk.shell_apk.webManifestUrl" android:value="{{ web_manifest_url }}" />
         <service