Maintain uncompressed dex through hiddenapi encode

hiddenapi encode unzips and rezips the dex jar.  Pass uncompressDex
into it so that it doesn't make classes.dex compressed in the dex
jar when it was previously uncompressed.

Bug: 123100239
Test: m checkbuild
Test: zipinfo $OUT/system/framework/conscrypt.jar shows uncompressed classes.dex
Change-Id: If36cde330eb0bcb1e1db3c582452c5faebc8ff29