Rework Bedrock edition shields

So on java edition you hold RMB for the shield but on bedrock edition you have to crouch to activate, this causes a few problems. When fighting under water and need to use your shield you would need to crouch to activate it, this also causes the player to sink to the bottom of the ocean making it harder to hit your target. To make this better you could add a dedicated shield button for touch controls, activate the shield with the left trigger on console and use RMB for pc.