Migration from jb-mr2 to master for Widevine CDM

Android development of the widevine CDM has been done
on the jb-mr2 branch of the cdm code base.  This CL
contains a merge of that jb-mr2 work to CDM master, and
also reflects the evolution of the common Modular DRM
code base since jb-mr2 branched.

Change-Id: I1d7e1a12d092c00044a4298261146cb97808d4ef

libwvdrmengine/cdm/src/log.cpp

@@ -10,7 +10,9 @@
 
 namespace wvcdm {
 
-void log_write(LogPriority level, const char *fmt, ...) {
+void InitLogging(int argc, const char* const* argv) {}
+
+void Log(const char* file, int line, LogPriority level, const char* fmt, ...) {
   va_list ap;
   char buf[LOG_BUF_SIZE];
   va_start(ap, fmt);