[incfs] Notify IncrementalService about system startup later

It needs system to be ready to bind to services, which is much
later in the boot process

Bug: 151241369
Test: boot up Android, make sure no error messages from
  IncrementalService trying to bind a DataLoader when the OS
  can't bind services yet
Change-Id: Ibcef3f405965ee07c5b8adbb41f068be734bde9e

services/java/com/android/server/SystemServer.java

@@ -2174,12 +2174,6 @@ public final class SystemServer {
         mPackageManagerService.systemReady();
         t.traceEnd();
 
-        if (mIncrementalServiceHandle != 0) {
-            t.traceBegin("MakeIncrementalServiceReady");
-            setIncrementalServiceSystemReady(mIncrementalServiceHandle);
-            t.traceEnd();
-        }
-
         t.traceBegin("MakeDisplayManagerServiceReady");
         try {
             // TODO: use boot phase and communicate these flags some other way
@@ -2449,6 +2443,12 @@ public final class SystemServer {
                 reportWtf("Notifying incident daemon running", e);
             }
             t.traceEnd();
+
+            if (mIncrementalServiceHandle != 0) {
+                t.traceBegin("MakeIncrementalServiceReady");
+                setIncrementalServiceSystemReady(mIncrementalServiceHandle);
+                t.traceEnd();
+            }
         }, t);
 
         t.traceEnd(); // startOtherServices