AOSP/Calendar - .java files deleted

Since the AOSP Calendar app has been fully
converted to Kotlin, the .java files have been
deleted. The app has gone through the general
battery of tests such as unit, cts, and manual
testing to ensure the app still functions properly.

Test: manual - build tests, unit tests, and
    CTS tests were conducted using the following
    commands:
    $ make Calendar
    $ make CalendarTests -j
    $ adb install -r -t -d out/target/product/bonito/
    testcases/CalendarTests/arm64/CalendarTests.apk
            Success

    $ adb shell am instrument -w com.android.calendar.tests
    	com.android.calendar.FormatDateRangeTest:.
	com.android.calendar.UtilsTests:..................
	com.android.calendar.WeekNumberTest:.
	com.android.calendar.widget.CalendarAppWidgetServiceTest:..
	Test results for InstrumentationTestRunner=..........
	Time: 0.162

	OK (22 tests)

    General CTS Tests:
    $ tools/cts-tradefed
    cts-tf > run cts -m CtsProviderTestCases

================= Results ==================
=============== Consumed Time ==============
    arm64-v8a CtsProviderTestCases: 13m 38s
Total aggregated tests run time: 13m 38s
============== TOP 1 Slow Modules ==============
    arm64-v8a CtsProviderTestCases: 0.46 tests/sec [376 tests / 818070 msec]
============== Modules Preparation Times ==============
    arm64-v8a CtsProviderTestCases => prep = 10106 ms || clean = 2243 ms
Total preparation time: 10s  ||  Total tear down time: 2s
=======================================================
=============== Summary ===============
Total Run time: 15m 16s
1/1 modules completed
Total Tests       : 376
PASSED            : 362
FAILED            : 0
IGNORED           : 6
ASSUMPTION_FAILURE: 8
============== End of Results ==============

Change-Id: I48d05571f02e77edac5e9522922d890f1adb2cf0
43 files changed