Add an expected failure util to catch assertion error for known bugs without failing the tests.

Author: rros

app/src/androidTest/kotlin/org/fossify/calendar/testing/ExpectedFailureUtils.kt

@@ -0,0 +1,13 @@
+package org.fossify.calendar.testing
+
+fun expectedFailure(testName: String = "", block: () -> Unit) {
+    try {
+        block()
+        println("WARNING: Expected failure test '$testName' passed unexpectedly.")
+    } catch (e: Throwable) {
+        println("Expected failure in test '$testName': ${e.javaClass.simpleName}: ${e.message}")
+        return
+    }
+
+    throw AssertionError("Expected failure test '$testName' passed unexpectedly. Investigate: bug may be fixed.")
+}