Rebrand the term "rollback" to "revert" for apexd

StagingManager is a client of apexd. Rebrand in apexd requires we make
similar changes in StagingManager.

Bug: 144831762
Test: Builds without error
Change-Id: Idf2104e76a89bd8cd08778ca53129377255031af
diff --git a/services/core/java/com/android/server/pm/ApexManager.java b/services/core/java/com/android/server/pm/ApexManager.java
index fc87acb..44c36ee0 100644
--- a/services/core/java/com/android/server/pm/ApexManager.java
+++ b/services/core/java/com/android/server/pm/ApexManager.java
@@ -565,12 +565,12 @@
                         ipw.println("State: ACTIVATION FAILED");
                     } else if (si.isSuccess) {
                         ipw.println("State: SUCCESS");
-                    } else if (si.isRollbackInProgress) {
-                        ipw.println("State: ROLLBACK IN PROGRESS");
-                    } else if (si.isRolledBack) {
-                        ipw.println("State: ROLLED BACK");
-                    } else if (si.isRollbackFailed) {
-                        ipw.println("State: ROLLBACK FAILED");
+                    } else if (si.isRevertInProgress) {
+                        ipw.println("State: REVERT IN PROGRESS");
+                    } else if (si.isReverted) {
+                        ipw.println("State: REVERTED");
+                    } else if (si.isRevertFailed) {
+                        ipw.println("State: REVERT FAILED");
                     }
                     ipw.decreaseIndent();
                 }