Remove legacy WRITE_EXTERNAL_STORAGE permission check for Installers

Bug: 239495492
Bug: 243924784
Test: atest ScopedStorageHostTest#testCheckInstallerAppAccessToObbDirs
Change-Id: Id96c854c0b31e94d367dccd125ad5c14523cdc79
Merged-In: Id96c854c0b31e94d367dccd125ad5c14523cdc79
(cherry picked from commit 33e2c5008b925c6e4349788be1aba19a6d19aa99)
1 file changed