Import message format.

Imported from mscherer's SVN repository:

svn checkout http://source.icu-project.org/repos/icu/icu4j/branches/markus/simplemsg

at revision 35802:

Local changes include :
- Removal of commented code.
- Addition of android makefiles
- JUnit test + caliper benchmark.

Scenario{vm=app_process, trial=0, benchmark=Genders} 45870.31 ns; σ=58.09 ns @ 3 trials
Scenario{vm=app_process, trial=0, benchmark=Plurals} 109590.42 ns; σ=209.97 ns @ 3 trials

Change-Id: I868f18bd3cbeb2581e799ef68ff2ad4e701e033e
20 files changed