Update gradle version and remove app version number from the Manifest

build.gradle

@@ -22,6 +22,6 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.android.tools.build:gradle:3.2.0'
     }
 }

graphenej/build.gradle

@@ -6,7 +6,7 @@ apply plugin: 'com.android.library'
 
 android {
     compileSdkVersion 24
-    buildToolsVersion '27.0.3'
+    buildToolsVersion '28.0.2'
 
     defaultConfig {
         minSdkVersion 14

graphenej/src/main/AndroidManifest.xml

@@ -2,14 +2,13 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="cy.agorise.graphenej">
 
-    <uses-sdk android:minSdkVersion="1" />
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application>
         <service
             android:name=".api.android.NetworkService"
             android:enabled="true"
-            android:exported="true"></service>
+            android:exported="true"/>
     </application>
 
 </manifest>