Add TimetableItemDetailScreenTest checks

[takahirom]

We can run the test by clicking the "Run" button on the left side of Android Studio.

Please add some test checks for the TimetableItemDetailScreen. The current code looks like this:

                    describe("click first session bookmark") {
                        run {
                            clickFirstSessionBookmark()
                        }
                        itShould("show bookmarked session") {
                            // FIXME: Add check for bookmarked session
                            captureScreenWithChecks()
                        }
                    }

We would like to add some checks similar to other tests. Please add a check like checkBookmarkedSessionDisplayed() in the robot and implement it.

                    itShould("show timetable items") {
                        captureScreenWithChecks(checks = {
                            checkTimetableItemsDisplayed()
                        })
                    }

It looks like there are 7 checks to fix in the TimetableItemDetailScreenTest.

https://github.com/DroidKaigi/conference-app-2024/blob/0a15d6b930e981217645ecd0d1be5bde4d412f22/feature/sessions/src/androidUnitTest/kotlin/io/github/droidkaigi/confsched/sessions/TimetableItemDetailScreenTest.kt#L58-L59

[Corvus400]

I've finished other tasks, so I'd like to start working on this one. 🙋

[takahirom]

@Corvus400 Thanks! Assigned 👍