android: fix min/max/taget_api_version annotation reduce

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
android: compile C code with an "infinity" of threads (~12% faster)

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
java: allow code block inside generated class (works only on Android)

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/java: move up `to_java_string` from `String` to `Text`

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>