fix back button on android app

android/app/capacitor.build.gradle

@@ -9,7 +9,7 @@ android {
 
 apply from: "../capacitor-cordova-android-plugins/cordova.variables.gradle"
 dependencies {
-
+    implementation project(':capacitor-app')
 
 }
 

android/app/src/main/assets/capacitor.plugins.json

@@ -1 +1,6 @@
-[]
+[
+	{
+		"pkg": "@capacitor/app",
+		"classpath": "com.capacitorjs.plugins.app.AppPlugin"
+	}
+]

android/capacitor.settings.gradle

@@ -1,3 +1,6 @@
 // DO NOT EDIT THIS FILE! IT IS GENERATED EACH TIME "capacitor update" IS RUN
 include ':capacitor-android'
 project(':capacitor-android').projectDir = new File('../node_modules/@capacitor/android/capacitor')
+
+include ':capacitor-app'
+project(':capacitor-app').projectDir = new File('../node_modules/@capacitor/app/android')