Set System Properties from android application

Set Property from android application

==> Add in AndroidManifest.xml
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    android:sharedUserId="android.uid.system"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.example"
    >
    
==> Android Source :
    // For Properties permission
    // Properties which start with "debug." have both SYSTEM & SHELL permisiion to edit
    system/core/init/property_service.c
    device/qcom/msm8960/system.prop 

===> For Set System Property from adnroid app
  try {

            @SuppressWarnings("rawtypes")
            Class SystemProperties = Class.forName("android.os.SystemProperties");


            Method set1 = SystemProperties.getMethod("set", new Class[] {String.class, String.class});
            set1.invoke(SystemProperties, new Object[] {"debug.example.example", "5000"});


        } catch( IllegalArgumentException iAE ){
            throw iAE;
        } catch( Exception e ){
            e.printStackTrace();
        }
        
==> Signed with platform keys
java -jar signapk.jar platform.x509.pem platform.pk8 example.apk example-sign.apk
Or
"AndroidSDK\build-tools\30.0.1\apksigner.bat" sign -v --key platform.pk8 --cert platform.x509.pem --out app-debug-signed.apk app-debug.apk