Fix lint warnings (#30)

Author: roberto-o-r

app/src/main/AndroidManifest.xml

@@ -7,13 +7,14 @@
 
     <application
             android:allowBackup="true"
+            android:fullBackupContent="true"
             android:usesCleartextTraffic="true"
             android:icon="@mipmap/ic_launcher"
             android:label="@string/app_name"
             android:roundIcon="@mipmap/ic_launcher_round"
             android:supportsRtl="true"
             android:theme="@style/AppTheme"
-            tools:ignore="GoogleAppIndexingWarning"
+            tools:ignore="GoogleAppIndexingWarning,UnusedAttribute"
     >
         <activity
                 android:name=".view.main.view.MainActivity"

app/src/main/res/layout/activity_main.xml

@@ -1,13 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<layout>
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
 
     <data>
 
     </data>
 
     <androidx.constraintlayout.widget.ConstraintLayout
-            xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:tools="http://schemas.android.com/tools"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -18,7 +17,8 @@
                    android:layout_width="match_parent"
                    android:visibility="visible"
                    android:background="@color/colorPrimary"
-                   android:src="@drawable/ic_launcher_foreground" />
+                   android:src="@drawable/ic_launcher_foreground"
+                   android:contentDescription="@string/splash_description"/>
 
         <WebView
             android:id="@+id/web_view"

app/src/main/res/values/strings.xml

@@ -1,3 +1,4 @@
 <resources>
     <string name="app_name">DEV Community</string>
+    <string name="splash_description">Splash</string>
 </resources>

data/src/main/res/values/strings.xml

@@ -1,3 +1,2 @@
 <resources>
-    <string name="app_name">basedata</string>
 </resources>