Replace typedef with using statement in cdm/core/ files.

[ Merge of http://go/wvgerrit/80805 ]

This change was used only where `typedef` was used for type aliasing,
and not for defining a new type (such as enums, structs, or function
pointer types).

Clang-format was used on the changed files.

Test: WV unit tests
Bug: 134437705
Change-Id: I730b9709a5ac773b3036daa79024caab665b3daa

libwvdrmengine/cdm/core/include/cdm_engine.h

@@ -33,8 +33,8 @@ class UsagePropertySet;
 class WvCdmEventListener;
 
 // Keep expiration time for each key set
-typedef std::map<CdmKeySetId, std::pair<CdmSessionId, int64_t> >
-    CdmReleaseKeySetMap;
+using CdmReleaseKeySetMap =
+    std::map<CdmKeySetId, std::pair<CdmSessionId, int64_t> >;
 
 class CdmEngine {
  public: