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

This reverts commit 1a0fa38342.

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

Change-Id: I6db416c6f30a662752687b33c9824bbd8fa9fd2b

java/droidstubs.go

@@ -334,11 +334,7 @@ func (d *Droidstubs) annotationsFlags(ctx android.ModuleContext, cmd *android.Ru
 		// 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")
 	}
 }