Add full support for Android scoped storage.

This was done by refactoring directory and file access handling for the Android platform so that any general filesystem access type go through the Android layer.
This allows us to validate whether the access is unrestricted, or whether it falls under scoped storage and thus act appropriately.

platform/android/java/editor/src/main/AndroidManifest.xml

@@ -14,8 +14,12 @@
         android:glEsVersion="0x00020000"
         android:required="true" />
 
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
+        tools:ignore="ScopedStorage" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="29"/>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
+        android:maxSdkVersion="29"/>
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application

platform/android/java/editor/src/main/java/org/godotengine/editor/GodotEditor.kt

@@ -30,10 +30,14 @@
 
 package org.godotengine.editor
 
+import android.Manifest
 import android.content.Intent
+import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
 import android.os.Debug
+import android.os.Environment
+import android.widget.Toast
 import androidx.window.layout.WindowMetricsCalculator
 import org.godotengine.godot.FullScreenGodotApp
 import org.godotengine.godot.utils.PermissionsUtil
@@ -68,7 +72,7 @@ open class GodotEditor : FullScreenGodotApp() {
 		val params = intent.getStringArrayExtra(COMMAND_LINE_PARAMS)
 		updateCommandLineParams(params)
 
-		if (BuildConfig.BUILD_TYPE == "debug" && WAIT_FOR_DEBUGGER) {
+		if (BuildConfig.BUILD_TYPE == "dev" && WAIT_FOR_DEBUGGER) {
 			Debug.waitForDebugger()
 		}
 
@@ -143,4 +147,50 @@ open class GodotEditor : FullScreenGodotApp() {
 	 * The Godot Android Editor sets its own orientation via its AndroidManifest
 	 */
 	protected open fun overrideOrientationRequest() = true
+
+	override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+		super.onActivityResult(requestCode, resultCode, data)
+		// Check if we got the MANAGE_EXTERNAL_STORAGE permission
+		if (requestCode == PermissionsUtil.REQUEST_MANAGE_EXTERNAL_STORAGE_REQ_CODE) {
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+				if (!Environment.isExternalStorageManager()) {
+					Toast.makeText(
+						this,
+						R.string.denied_storage_permission_error_msg,
+						Toast.LENGTH_LONG
+					).show()
+				}
+			}
+		}
+	}
+
+	override fun onRequestPermissionsResult(
+		requestCode: Int,
+		permissions: Array<String?>,
+		grantResults: IntArray
+	) {
+		super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+		// Check if we got access to the necessary storage permissions
+		if (requestCode == PermissionsUtil.REQUEST_ALL_PERMISSION_REQ_CODE) {
+			if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
+				var hasReadAccess = false
+				var hasWriteAccess = false
+				for (i in permissions.indices) {
+					if (Manifest.permission.READ_EXTERNAL_STORAGE == permissions[i] && grantResults[i] == PackageManager.PERMISSION_GRANTED) {
+						hasReadAccess = true
+					}
+					if (Manifest.permission.WRITE_EXTERNAL_STORAGE == permissions[i] && grantResults[i] == PackageManager.PERMISSION_GRANTED) {
+						hasWriteAccess = true
+					}
+				}
+				if (!hasReadAccess || !hasWriteAccess) {
+					Toast.makeText(
+						this,
+						R.string.denied_storage_permission_error_msg,
+						Toast.LENGTH_LONG
+					).show()
+				}
+			}
+		}
+	}
 }

platform/android/java/editor/src/main/res/values/strings.xml

@@ -1,4 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 	<string name="godot_editor_name_string">Godot Editor 4.x</string>
+
+	<string name="denied_storage_permission_error_msg">Missing storage access permission!</string>
 </resources>