Horse jump bar & camel dash bar textures are stretched horizontally when using touch controls

After fixing MCPE-156444, Horse Jump bar & Camel Dash bar now match the size of the Experience bar by stretching it horizontally, but this changes causes the pixel in the textures become inconsistent, as the textures isn't designed to be stretched

Step to Reproduce:

1. Tame a Horse/Mule/Donkey or ride a Camel, and then give it a saddle
2. Press your Jump button, notice the pixel in the textures isn't consistent, some of them become bigger/wider than it should be

Expected Result:
Horse jump bar & camel dash bar textures doesn't get stretched horizontally.

Observed Result:
Horse jump bar & camel dash bar textures stretched horizontally.

Notes:
This is especially apparent when switching between touch and keyboard controls.