wvcdm: filter logs by app uid

This commit is a combination of the following:
* http://go/wvgerrit/117003
* http://go/wvgerrit/118303

Bug: 162255728
Test: MediaDrmTest#testGetLogMessages
Change-Id: I5699b64d5c4bab463e5b587595fa7d324dc1d93f

libwvdrmengine/cdm/include/wv_content_decryption_module.h

@@ -183,6 +183,9 @@ class WvContentDecryptionModule : public android::RefBase, public TimerHandler {
   virtual CdmResponseType SetPlaybackId(const CdmSessionId& session_id,
                                         const std::string& playback_id);
 
+  virtual CdmResponseType GetSessionUserId(const CdmSessionId& session_id,
+                                           uint32_t* user_id);
+
  private:
   struct CdmInfo {
     CdmInfo();