Build fix.

packages/apps/Calendar/src/com/android/calendar/AllInOneActivity.kt:72:1: error: class 'AllInOneActivity' is not abstract and does not implement abstract member public abstract fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences!, key: String?): Unit defined in android.content.SharedPreferences.OnSharedPreferenceChangeListener
class AllInOneActivity : Activity(), EventHandler, OnSharedPreferenceChangeListener,
^
packages/apps/Calendar/src/com/android/calendar/AllInOneActivity.kt:686:5: error: 'onSharedPreferenceChanged' overrides nothing
override fun onSharedPreferenceChanged(prefs: SharedPreferences?, key: String) {
^
packages/apps/Calendar/src/com/android/calendar/GeneralPreferences.kt:49:1: error: class 'GeneralPreferences' is not abstract and does not implement abstract member public abstract fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences!, key: String?): Unit defined in android.content.SharedPreferences.OnSharedPreferenceChangeListener
class GeneralPreferences : PreferenceFragment(), OnSharedPreferenceChangeListener,
^
packages/apps/Calendar/src/com/android/calendar/GeneralPreferences.kt:175:5: error: 'onSharedPreferenceChanged' overrides nothing
override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String) {
^
packages/apps/Calendar/src/com/android/calendar/alerts/AlertUtils.kt:56:57: error: type mismatch: inferred type is PendingIntent? but PendingIntent was expected
mgr.setExact(type, triggerAtMillis, operation)
^
packages/apps/Calendar/src/com/android/calendar/alerts/AlertUtils.kt:58:52: error: type mismatch: inferred type is PendingIntent? but PendingIntent was expected
mgr.set(type, triggerAtMillis, operation)
^
https://android-build.googleplex.com/builds/pending/P54933224/cf_x86_64_phone-userdebug/latest/view/logs/build_error.log

Bug: 275409981
Test: local finalization topic + m
Change-Id: Idec17650fd6063495375d6a26b720286ef02ec96