put back the unused virtuals in Vector<>

some binaries are using these private APIs and broke
(as they should!) with this change. Temporarily restore the
virtuals to work around this.

Bug: 6977550
Change-Id: I7c37f24b16e4d586b89205c493db5169cf87e024
Add support for exec command in init scripts.
Fix for ADB in recovery mode
STE Multimedia Fix [3/4]

Thanks @NovaFusion for help