Android patch: convrtrs.txt: JavaUnicode customizations.

This change was introduced in Android by the ICU421 and ICU4.6 upgrades:

https://android.googlesource.com/platform/external/icu/+/85bf2e2
https://android.googlesource.com/platform/external/icu/+/27f6547

(cherry picked from commit f8387513469806088e05f3807ceec1d4d2466199)

Test: n/a
Change-Id: I801bb8040a7386231006506778b088db563c70cd
1 file changed