Revert "Handle multiple isolated uid to host uid mapping"

This reverts commit b7f6db8b446794a1a6920504516ce0a5e785db6a.

Bug: 198744488
Reason for revert: https://android-build.googleplex.com/builds/quarterdeck?branch=git_stage-aosp-master&target=aosp_cf_x86_phone-userdebug&lkgb=7699888&lkbb=7700909&fkbb=7700267, bug 198744488

Change-Id: If4d39f1e4a7be02555c82743947d7094567654bd
7 files changed