Add special path for system server dex file reconciliation

We need a special path for system server dex file reconcilliation.
- we cannot use the application info to extract the arguments
for the installd call
- but we can use normal file checks because the system server has
the right permission.

Test: DexManagerTests, manual
Bug: 148774920
Change-Id: Ic63aee129d10f6905cecbdba1feeb0320ee0ca1c