[android] input over(lay)haul 2: Individual scaling of buttons (#2562)

### (Needs testing)

This PR makes it possible to adjust the scale of each touch input overlay button independently from the global scale
This individual value always goes on top of the global scale.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2562
Co-authored-by: nyx <contact@innix.space>
Co-committed-by: nyx <contact@innix.space>

src/android/app/src/main/res/values/strings.xml

@@ -855,6 +855,7 @@
     <string name="touchscreen">Touchscreen</string>
     <string name="lock_drawer">Lock drawer</string>
     <string name="unlock_drawer">Unlock drawer</string>
+    <string name="reset">Reset</string>
 
     <string name="load_settings">Loading settings…</string>