Revert "Don't create separate mount namespaces for pre-apexd processes"

This reverts commit 5ab1300481bdc6587139e3ab2bf96b675a8c4a01.

Reason: Breaks some 3p apps.

Bug: 122920047
Test: run the app, login.
Change-Id: Iec3347d7f35fbb6f32fd1192135a0cf87dc123a7
(cherry picked from commit 80aec3f0f016933159c5a9a29214a444ca60fafa)
1 file changed