[Android] Not possible to map touch inputs.

Description

[Touch inputs don't register when trying to bind hotkeys, like Ai service button, for example. Premade hotkeys like down+select to bring up the menu work ingame though. I can map external controller inputs, select for hotkey and L1 for Ai service, but nothing happens when pressing the same buttons after with touch.]

Expected behavior

[Be able to bind touch inputs or at least have a reference list of touch input names (recognized internally by retroarch) to bind manually in the cfg.]

Actual behavior

[No input is registered (time runs out) or "mouse1" is recognized because of pressing to much, with is not useful ingame.]

Steps to reproduce the bug

1. [Go to Settings>Input>hotkeys]
2. [Try to bind input using any touch overlay]

Bisect Results

[Never tried before last week when testing the Ai service, but I'll assume always.]

Version/Commit

You can find this information under Information/System Information

• RetroArch: [4c6b139]

Environment information

• OS: [Android 8.1.0 MIUI 10.3.2]

Start at Settings>Input>hotkeys on Android and reproduce binding attempts with a touch overlay, comparing them with external controller inputs and the premade down+select hotkey. Done means touch inputs can be bound and triggered reliably, or the internally recognized touch input names are documented for manual configuration.