Implement activity --proto --processes

Bug: 66729158
Test: out/host/linux-x86/bin/incident_report -w amprocesses
Change-Id: Iae043203bca954bfc4aadad0460cc56621e9ba05
diff --git a/services/core/java/com/android/server/am/ProcessRecord.java b/services/core/java/com/android/server/am/ProcessRecord.java
index a1e5947..03e140d 100644
--- a/services/core/java/com/android/server/am/ProcessRecord.java
+++ b/services/core/java/com/android/server/am/ProcessRecord.java
@@ -679,6 +679,7 @@
                 proto.write(ProcessRecordProto.ISOLATED_APP_ID, UserHandle.getAppId(uid));
             }
         }
+        proto.write(ProcessRecordProto.PERSISTENT, persistent);
         proto.end(token);
     }