Make the PIC stringblock local

The shared memory string block can be ephemeral in the Java layer.
This change uses the persistent copy in the native layer.  This saves
8Kb for every process in the system.

Flag: android.app.pic_uses_shared_memory
Bug: 360897450
Test: atest
 * FrameworksCoreTests:PropertyInvalidatedCacheTests
 * FrameworksCoreTests:IpcDataCacheTest
 * CtsOsTestCases:IpcDataCacheTest
Change-Id: I7913507a5428a0d32afe2d41f026f104fccf4a88