Update emoji character data to Unicode 10.0 / Emoji 5.0 (which also
removes U+1F93B MODERN PENATHLON from the emoji base letters).
Also add unit tests for line breaking for new characters (based on
earlier work by Seigo Nonaka).
Test: All new and existing unit tests pass;
Test: Manually tested line breaking of new emojis in TextView.
Bug: 28364892
Bug: 28678294
Bug: 30874706
Change-Id: I367cdab09187dc08a66a3112a5181a2b7fb338a5
3d10a1ed4f