Android: convert kEnumName to ENUM_NAME in java_cpp_enum.py.

Since the Blink rename, enum entry names now use the kCamelCase naming
convention instead of SHOUTY_CASE. This doesn't match well with Java
naming conventions and Java constants created by java_cpp_enum.py look
out of place with the rest of the Java codebase.

This CL modifies java_cpp_enum.py so that C++ enum naming conventions
don't leak into the Java side, specifically translating kCamelCase and
CamelCase enum entries to SHOUTY_CASE.

BUG=710335

Review-Url: https://codereview.chromium.org/2815103004
Cr-Commit-Position: refs/heads/master@{#464661}
21 files changed