apply DynamicColors when available

app/src/main/AndroidManifest.xml

@@ -3,12 +3,15 @@
         android:targetSandboxVersion="2">
     <original-package android:name="org.grapheneos.pdfviewer" />
 
-    <application android:icon="@mipmap/ic_launcher"
-            android:roundIcon="@mipmap/ic_launcher"
+    <application
+            android:name=".App"
+            android:allowBackup="true"
+            android:icon="@mipmap/ic_launcher"
             android:label="@string/app_name"
-            android:theme="@style/AppTheme"
-            android:allowBackup="true">
-        <activity android:name=".PdfViewer"
+            android:roundIcon="@mipmap/ic_launcher"
+            android:theme="@style/AppTheme">
+        <activity
+            android:name=".PdfViewer"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/app/grapheneos/pdfviewer/App.kt

@@ -0,0 +1,13 @@
+package app.grapheneos.pdfviewer
+
+import android.app.Application
+import com.google.android.material.color.DynamicColors
+
+class App : Application() {
+
+    override fun onCreate() {
+        super.onCreate()
+        DynamicColors.applyToActivitiesIfAvailable(this)
+    }
+
+}