Merge branch 'tc/ic_launcher' into 'master'

Add adaptive icon and activate round icon in manifest

See merge request !187

android/app/src/debug/res/mipmap-anydpi/ic_launcher.xml

+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/gray"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>
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android/app/src/main/AndroidManifest.xml

@@ -11,6 +11,7 @@
             android:allowBackup="true"
             android:label="@string/app_name"
             android:icon="@mipmap/ic_launcher"
+            android:roundIcon="@mipmap/ic_launcher_round"
             android:theme="@style/AppTheme">
         <activity
                 android:name=".MainActivity"

android/app/src/main/res/mipmap-anydpi/ic_launcher.xml

+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@color/magenta"/>
+  <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>
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