refactor(unstake): use HeaderStandard instead of getStakingNavbar#30281

weitingsun wants to merge 2 commits into

mainMetaMask/metamask-mobile:mainfrom

wsun/changing-unstake-screen-to-use-headerstandardMetaMask/metamask-mobile:wsun/changing-unstake-screen-to-use-headerstandardCopy head branch name to clipboard