Revert "Disable a few metalava checks that platform fails after improvements."

This reverts commit 1a0fa38342845fc7a9b51a9d31721e9e92760752.

Reason for revert: No longer needed
Bug: 217545629
Bug: 217552813

Change-Id: I6db416c6f30a662752687b33c9824bbd8fa9fd2b
diff --git a/java/droidstubs.go b/java/droidstubs.go
index f9dcfd6..7ad316f 100644
--- a/java/droidstubs.go
+++ b/java/droidstubs.go
@@ -334,11 +334,7 @@
 		// TODO(tnorbye): find owners to fix these warnings when annotation was enabled.
 		cmd.FlagWithArg("--hide ", "HiddenTypedefConstant").
 			FlagWithArg("--hide ", "SuperfluousPrefix").
-			FlagWithArg("--hide ", "AnnotationExtraction").
-			// (b/217545629)
-			FlagWithArg("--hide ", "ChangedThrows").
-			// (b/217552813)
-			FlagWithArg("--hide ", "ChangedAbstract")
+			FlagWithArg("--hide ", "AnnotationExtraction")
 	}
 }