Move spanned utility class only needed for tests

Bug 30976481

Change-Id: Iee3d28849701d5a189ac01c1d64056a862f8e8dc
diff --git a/src/com/android/contacts/common/format/SpannedTestUtils.java b/tests/src/com/android/contacts/common/format/SpannedTestUtils.java
similarity index 100%
rename from src/com/android/contacts/common/format/SpannedTestUtils.java
rename to tests/src/com/android/contacts/common/format/SpannedTestUtils.java