The style used in the composing text for input methods
takes a long time to create. This is experienced as a
lag when composing the first word.
The bottleneck lies in the 10 calls to
nativeIndexOfString which does a linear search through
thousands of strings.
Change-Id: I3184b2be3673d384cca19e9a70ad94b4d3085576
ac4a181d2e