Update README with instructions to allow all files access (#11)

Author: Luna712

README.md

@@ -17,10 +17,41 @@ This template includes 1 example plugin.
    - Windows: `.\gradlew.bat ExampleProvider:make` or `.\gradlew.bat ExampleProvider:deployWithAdb`
    - Linux & Mac: `./gradlew ExampleProvider:make` or `./gradlew ExampleProvider:deployWithAdb`
 
+
+## Granting All Files Access on Newer Android Devices
+
+For local plugin testing, you need to grant the app "All Files Access" on newer Android devices (Android 11 and above). Here’s how to do it:
+
+### Using ADB
+
+* `adb shell appops set --uid PACKAGE_NAME MANAGE_EXTERNAL_STORAGE allow`
+* Replace `PACKAGE_NAME` with the name of the package for the Cloudstream3 version you are using:
+   - debug: `com.lagradost.cloudstream3.prerelease.debug`
+   - prerelease: `com.lagradost.cloudstream3.prerelease`
+   - stable: `com.lagradost.cloudstream3`
+
+### Manually
+
+1. **Open Settings**: Go to your device’s Settings menu.
+
+2. **Navigate to Special Access**:
+   - Tap on "Apps & notifications" or "Apps".
+   - Select "Special app access" or "Special access".
+
+3. **Select All Files Access**:
+   - Tap on "All files access".
+   - It may be under the three vertical dots menu towards the top of the screen.
+
+4. **Grant Access to the App**: Find the app in the list and tap on it to toggle it, if it is not already enabled.
+
+6. **Restart the App**: Close and reopen the app to apply the changes.
+
+
 ## License
 
 Everything in this repo is released into the public domain. You may use it however you want with no conditions whatsoever
 
+
 ## Attribution
 
 This template as well as the gradle plugin and the whole plugin system is **heavily** based on [Aliucord](https://github.com/Aliucord).