min sdk 18 in e2e

AndroidE2E/app/build.gradle

     buildToolsVersion "25.0.2"
     defaultConfig {
         applicationId "com.reactnativenavigation.e2e.androide2e"
-        minSdkVersion 23
+        minSdkVersion 18
         targetSdkVersion 25
         versionCode 1
         versionName "1.0"

AndroidE2E/app/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    package="com.reactnativenavigation.e2e.androide2e">
+          xmlns:tools="http://schemas.android.com/tools"
+          package="com.reactnativenavigation.e2e.androide2e">
 
     <uses-sdk
-        android:minSdkVersion="23"
-        tools:overrideLibrary="android.support.test.uiautomator.v18" />
+        android:minSdkVersion="18"
+        tools:overrideLibrary="android.support.test.uiautomator.v18"/>
 
     <application
         android:allowBackup="true"

lib/android/app/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.reactnativenavigation">
+          package="com.reactnativenavigation">
 
     <application>
         <activity
             android:name="com.facebook.react.devsupport.DevSettingsActivity"
-            android:exported="false" />
+            android:exported="false"/>
     </application>
 </manifest>

playground/android/app/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.reactnativenavigation.playground">
+          package="com.reactnativenavigation.playground">
 
-    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.INTERNET"/>
 
     <application
         android:name=".MainApplication"
             android:label="@string/app_name"
             android:launchMode="singleTask">
             <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.LAUNCHER"/>
             </intent-filter>
         </activity>
     </application>