LatinIME: Add accents to german keyboard

This fixes http://code.google.com/p/android/issues/detail?id=26247

Add
// U+00E9: "é" LATIN SMALL LETTER E WITH ACUTE
// U+00E8: "è" LATIN SMALL LETTER E WITH GRAVE
// U+00EA: "ê" LATIN SMALL LETTER E WITH CIRCUMFLEX
// U+00EB: "ë" LATIN SMALL LETTER E WITH DIAERESIS

Change-Id: I81d79f153cdfe7015bd0a343c681322ab8316db7