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
Merged-In: Ib1ed417072a3e942284e267e660631bd9e863248
Merged-In: I30244cf18aa6522361f13a1d2119ac5847939ddd
Change-Id: I4e913a12477fd4a64990033eaae533e30863e2a2