Run clang-format on Core

This copies over formatting changes from the Widevine CDM repository
that resulted from running clang-format with Google style on the
shared core/ directory. It also copies over some rewordings of log
messages that were made at the same time.

Aside from the changed log messages, this should not affect behavior
or functionality.

Change-Id: I69c57c188f7a79f30fa3517afeed17365929b6b6

libwvdrmengine/cdm/core/include/oemcrypto_adapter.h

@@ -7,10 +7,7 @@
 
 namespace wvcdm {
 
-enum SecurityLevel {
-  kLevelDefault,
-  kLevel3
-};
+enum SecurityLevel { kLevelDefault, kLevel3 };
 
 /* This attempts to open a session at the desired security level.
    If one level is not available, the other will be used instead. */