Create shared memory region for framework APIs
System server owns a read-write mapping to this region. App processes are initialized with a read-only mapping. Shared memory can be used to quickly read information that's maintained by system server from any app process, without the overhead of Binder, where the additional features offered by Binder IPC are not required. Demonstrate the use of shared memory to implement network clock. go/ApplicationSharedMemory-bluedoc Bug: 361329788 Bug: 365575551 Change-Id: Ic7e8231355392880b34a659e8531b3bba0614b27 Flag: com.android.internal.os.application_shared_memory_enabled Flag: android.os.network_time_uses_shared_memory Tested: ApplicationSharedMemoryTest Tested: SystemClockNetworkTimeTest NO_IFTTT=adding IFTTT
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