Elliott Hughes 1f7b854d70 Use String8 for UTF16 to UTF8 conversion.
This is the only actual user of libcutils' jstring.h.

Test: treehugger
Change-Id: I0444d42e5a3ca57de3bffca48aa265f267c3d4dc
2019-08-08 09:36:14 -07:00
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