Fix NPE when deleting old zen rules

Test: manually revoke access for a DND app that has rules
created before and after b/189332346
Bug: 191773100
Bug: 189332346
Bug: 235823407

Change-Id: I069fcc124af24227fa50b61d4fc55d6dadc7a20b
Merged-In: I069fcc124af24227fa50b61d4fc55d6dadc7a20b
(cherry picked from commit b4fe101)
(cherry picked from commit 66896a0)
Merged-In: I069fcc124af24227fa50b61d4fc55d6dadc7a20b

Author: Julia Reynolds

services/core/java/com/android/server/notification/ZenModeHelper.java

@@ -405,7 +405,14 @@ public boolean removeAutomaticZenRules(String packageName, String reason) {
             newConfig = mConfig.copy();
             for (int i = newConfig.automaticRules.size() - 1; i >= 0; i--) {
                 ZenRule rule = newConfig.automaticRules.get(newConfig.automaticRules.keyAt(i));
-                if (rule.pkg.equals(packageName) && canManageAutomaticZenRule(rule)) {
+                String pkg = rule.pkg != null
+                        ? rule.pkg
+                        : (rule.component != null)
+                                ? rule.component.getPackageName()
+                                : (rule.configurationActivity != null)
+                                        ? rule.configurationActivity.getPackageName()
+                                        : null;
+                if (Objects.equals(pkg, packageName) && canManageAutomaticZenRule(rule)) {
                     newConfig.automaticRules.removeAt(i);
                 }
             }