Avoid unavailable APIs in ShellUtil

executeShellCommandRwe is U+. Use executeShellCommandRw which is S+
instead, and annotate methods accordingly. stderr is not used in any
instrumentation at the moment.

Bug: 405109522
Test: atest
Change-Id: I8212cb340cfb7e5ee5d0da314613b474e4f155fc
2 files changed