ucnv: added MR0 symbols for backwards compatibility

Change-Id: I799be510f09e314c0aa7d2f2f845c30d7c05e2c4
ucnv: Add ICS symbols for back-compat

Blobs linked with ICS's libicuuc.so need these

Change-Id: I946e4e4eabdd2d9dc8e94a3d5b747ea6c19ab0aa

Signed-off-by: artas182x <artas182x@gmail.com>