Enable in-process permission caches for system_server

Bug: 170472470

Do not disable the permission caches inside the system server.  This
is beneficial because permission checks require many binder calls, and
the cache, even though it is in-process, eliminates those calls.
1. Make the PermissionManager cache more effective by increasing the
   maximum size to 2048.  Experiments show that the high-water mark is
   about 600.
2. Suppress cache content in the 'dumpsys cacheinfo' output.  dumpsys
   fails if the output is too large in a single process, and the new
   caches push the system server cacheinfo over the limit.  The
   content can be added to the output by setting the new DETAILED
   boolean in PropertyInvalidatedCache to true, but this flag should
   never be committed with a value of true.

Test: two atest runs
 * atest FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testGetPermissionGrantState
 * atest FrameworksServicesTests:NetworkPolicyManagerServiceTest

Change-Id: I7d3c1f34b44216bb510319ca5b6aced1cc53e05d