AOSP/Calendar - update the Calendar version to target P (28) or higher.
Bug: 119500483
Test: manual - Ran the following CTS tests on Pixel phone. Tested the calendar UI.
$ adb shell am instrument -w com.android.calendar.tests
$ ./development/testrunner/runtest.py --path cts/tests/tests/provider/src/android/provider/cts/CalendarTest.java
android.provider.cts.CalendarTest:................................
Time: 16.918
OK (32 tests)
$ ./development/testrunner/runtest.py --path cts/tests/tests/content/src/android/content/cts/AvailableIntentsTest.java
android.content.cts.AvailableIntentsTest:.................................
Time: 0.202
OK (33 tests)
$ ./development/testrunner/runtest.py --path cts/hostsidetests/appsecurity/test-apps/PrivilegedUpdateApp/src/com/android/cts/privilegedupdate/PrivilegedUpdateTest.java
com.android.cts.privilegedupdate.PrivilegedUpdateTest:...
Time: 0.204
OK (3 tests)
$ ./development/testrunner/runtest.py --path cts/tests/tests/permission2/src/android/permission2/cts/ProtectedBroadcastsTest.java
android.permission2.cts.ProtectedBroadcastsTest:..
Time: 0.139
OK (2 tests)
Change-Id: Id3e48f100d685aaf03c2c726b75def4437b980cb