Haptic feedback/Vibration strength parameter is ignored

Description

Android devices.
Haptic feedback/Vibration strength parameter is ignored

Expected behavior

the "Vibration strenght" for the touch input can be set between 0% and 100% in 5% steps.
That should affect how the vibration is executed.

Actual behavior

In fact, nothing changes at all. Vibration intensity stays the same.

Steps to reproduce the bug

1 ) Open Retroarch 1.19.1 (this happens since several versions actually) on Android
2) Run a game with any core
3) use a touch overlay. The default is fine, or anyone else for what it's worth it.
4) go to Settings -> -> Input -> Haptic Feedback/Vibration and ensure that "Vibrate on keypress" is enabled
5) on the same configuration screen, change the vibration strength from "100%" to any other value and see that the vibration is the same.

Bisect Results

This happens since I started using Retroarch on Android in 2022.

Version/Commit

• RetroArch: 1.19.1 stable

• Environment information

• OS: Android 13. This happened on older versions of Android too.

Start by reproducing the issue in RetroArch 1.19.1 on Android through Settings → Input → Haptic Feedback/Vibration, using a touch overlay and changing Vibration strength. Trace the Android touch-input haptic path from that setting and verify that values from 0% to 100% in 5% steps produce different vibration intensities. Done means the configured strength affects vibration execution on supported Android versions.