feat(shortcuts): add adaptive icon support 🎉

Author: EdricChan03

app/src/main/res/drawable-v25/new_todo.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/lightGrey"/>
+    <foreground>
+        <inset
+            android:drawable="@drawable/ic_shortcut_todo_foreground"
+            android:inset="30%" />
+    </foreground>
+</adaptive-icon>

app/src/main/res/drawable-v26/ic_shortcut_todo.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="@color/lightGrey" />
+    <size android:height="44dp" android:width="44dp" />
+</shape>

app/src/main/res/drawable/ic_app_shortcut_background.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:drawable="@drawable/ic_app_shortcut_background"
+        android:left="2dp"
+        android:top="2dp"
+        android:bottom="2dp"
+        android:right="2dp" />
+    <item android:drawable="@drawable/ic_shortcut_todo_foreground" />
+</layer-list>

app/src/main/res/drawable/ic_shortcut_todo.xml

@@ -8,4 +8,5 @@
     <color name="colorOrange">#FFC107</color>
     <color name="white">#FFF</color>
     <color name="colorGrey800">#424242</color>
+    <color name="lightGrey">#fff5f5f5</color>
 </resources>

app/src/main/res/drawable-v25/ic_plus.xml renamed to app/src/main/res/drawable/ic_shortcut_todo_foreground.xml

@@ -3,7 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools">
     <shortcut
         android:enabled="true"
-        android:icon="@drawable/new_todo"
+        android:icon="@drawable/ic_shortcut_todo"
         android:shortcutDisabledMessage="@string/shortcut_todo_disabled_msg"
         android:shortcutId="new_todo"
         android:shortcutLongLabel="@string/shortcut_todo_long_msg"