Only allow access to the dexopt commands from root or shell.

To align with ART Service behaviour (cf.
commit 62e115d7682ee3ee277ab250499cb7afa8dffc50 in art/).

This also drops the intentionally allowed app use of the
`dump-profiles` command from
commit a8777082.

Test: adb shell pm dump-profiles com.android.egg
Bug: 251903639
Change-Id: Ib547600e98bb9fab938f09b90f25cf80a762c78e