Disallow device admin package and protected packages to be reinstalled as instant.

We should prevent the following types of apps from being reinstalled with
--install-existing as an instant.
(1)device admin package
(2)protected packages

Flag: EXEMPT bugfix

Bug: 341256043
Test: Manual test
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b5f80792e258a38eb88b3cb480e1d468d7cd2a43)
Merged-In: Ib1ed417072a3e942284e267e660631bd9e863248
Change-Id: Ib1ed417072a3e942284e267e660631bd9e863248