Remove redundant config in AndroidManifest.xml

Summary:
* remove redundant version code, name, miniSdk, targetSdk, they now are configed in build.gradle
* allowbackup = true is not a secure config

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Clean up redundant config and remove security risk config.

test android template still works.

none

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  CATEGORY
[----------]        TYPE
[ CLI      ]   [-------------]      LOCATION
[ DOCS     ]   [ BREAKING    ]   [-------------]
[ GENERAL  ]   [ BUGFIX      ]   [-{Component}-]
[ INTERNAL ]   [ ENHANCEMENT ]   [ {File}      ]
[ IOS      ]   [ FEATURE     ]   [ {Directory} ]   |-----------|
[ ANDROID  ]   [ MINOR       ]   [ {Framework} ] - | {Message} |
[----------]   [-------------]   [-------------]   |-----------|

[CATEGORY] [TYPE] [LOCATION] - MESSAGE

 EXAMPLES:

 [IOS] [BREAKING] [FlatList] - Change a thing that breaks other things
 [ANDROID] [BUGFIX] [TextInput] - Did a thing to TextInput
 [CLI] [FEATURE] [local-cli/info/info.js] - CLI easier to do things with
 [DOCS] [BUGFIX] [GettingStarted.md] - Accidentally a thing/word
 [GENERAL] [ENHANCEMENT] [Yoga] - Added new yoga thing/position
 [INTERNAL] [FEATURE] [./scripts] - Added thing to script that nobody will see
-->
Closes https://github.com/facebook/react-native/pull/17596

Differential Revision: D6768292

Pulled By: hramos

fbshipit-source-id: 9f32f17aebb9c1857d8b64d6687efe7c22e7bc79

local-cli/templates/HelloWorld/android/app/src/main/AndroidManifest.xml

@@ -1,20 +1,14 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.helloworld"
-    android:versionCode="1"
-    android:versionName="1.0">
+    package="com.helloworld">
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
 
-    <uses-sdk
-        android:minSdkVersion="16"
-        android:targetSdkVersion="22" />
-
     <application
       android:name=".MainApplication"
-      android:allowBackup="true"
       android:label="@string/app_name"
       android:icon="@mipmap/ic_launcher"
+      android:allowBackup="false"
       android:theme="@style/AppTheme">
       <activity
         android:name=".MainActivity"