[Android WebAPK] Update org.chromium.webapk.new.splash test app to handle share intents

BUG=None

Change-Id: Ie52659e0042e608e045dd2ffb89ca370c964e6f3
Reviewed-on: https://chromium-review.googlesource.com/c/1298428Reviewed-by: Xi Han <hanxi@chromium.org>
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603155}

chrome/android/webapk/shell_apk/new_splash_manifest_config.json

@@ -24,11 +24,17 @@
   "share_template": [{
 	  "index": "0",
 	  "title": "Share All",
-	  "url_template": "https://pwa.rocks/share_public?title={title}&text={text}&url={url}"
+	  "action": "https://pwa.rocks/share.html",
+	  "param_title": "title",
+	  "param_text": "text",
+	  "param_url": "url"
   },
   {
 	  "index": "1",
 	  "title": "Share Title",
-	  "url_template": "https://pwa.rocks/share_private?title={title}"
+	  "action": "https://pwa.rocks/share_title.html",
+	  "param_title": "title",
+	  "param_text": "text",
+	  "param_url": "url"
   }]
 }