Check for existance of hyphenation pattern files first

This CL checks for existance (and readability) of hyphenation pattern
files before trying to read them. The main impact is reducing the
spam in the log due to the failure of calling RandomAccessFile() with
non-existing paths.

Test: Manual
Bug: 31727175
Bug: 36023892
Change-Id: I6963790fa205ab16d4ece548e4cbb0c15e279a14
1 file changed