Dump historical rollbacks for debugging purpose (3/n)

Bug: 172644981
Test: m
Change-Id: I6010de4d9273805a43df8b0e8f7798ea6bfc3f89

services/core/java/com/android/server/rollback/RollbackManagerServiceImpl.java

@@ -1242,6 +1242,18 @@ class RollbackManagerServiceImpl extends IRollbackManager.Stub implements Rollba
                 rollback.dump(ipw);
             }
             ipw.println();
+
+            List<Rollback> historicalRollbacks = mRollbackStore.loadHistorialRollbacks();
+            if (!historicalRollbacks.isEmpty()) {
+                ipw.println("Historical rollbacks:");
+                ipw.increaseIndent();
+                for (Rollback rollback : historicalRollbacks) {
+                    rollback.dump(ipw);
+                }
+                ipw.decreaseIndent();
+                ipw.println();
+            }
+
             PackageWatchdog.getInstance(mContext).dump(ipw);
         });
     }