Added support to blimp to be usable as a default browser

blimp/client/app/android/AndroidManifest.xml.jinja2

 <?xml version="1.0" encoding="utf-8"?>
 
 <!-- Copyright 2015 The Chromium Authors. All rights reserved.
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file. -->
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
         package="{{manifest_package}}">
     <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="21" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <application android:name="org.chromium.blimp.BlimpApplication"
             android:label="Blimp"
             android:icon="@mipmap/app_icon">
         <activity android:name="org.chromium.blimp.BlimpRendererActivity"
                   android:launchMode="singleTask"
                   android:theme="@android:style/Theme.Holo.Light.NoActionBar"
                   android:configChanges="orientation|keyboardHidden|keyboard|screenSize"
                   android:windowSoftInputMode="adjustNothing"
                   android:hardwareAccelerated="true">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <category android:name="android.intent.category.APP_BROWSER" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data android:scheme="http" />
+                <data android:scheme="https" />
             </intent-filter>
         </activity>
 
         <meta-data android:name="com.google.android.gms.version"
                 android:value="@integer/google_play_services_version" />
     </application>
 </manifest>