Log license request and response

[ Merge of http://go/wvgerrit/119563 ]

This also increases the max log size from 1024 to 5120

Bug: 181642154
Test: WV unit/integration tests
Change-Id: Ifae90354dad1165f4d9fa3c9fe33a4dc14df1270

libwvdrmengine/cdm/core/src/cdm_engine.cpp

@@ -304,6 +304,12 @@ CdmResponseType CdmEngine::GenerateKeyRequest(
     OnKeyReleaseEvent(key_set_id);
   }
 
+  LOGD(
+      "key request: (%zu) %s", key_request->message.size(),
+      wvcdm::Base64SafeEncode(std::vector<uint8_t>(key_request->message.begin(),
+                                                   key_request->message.end()))
+          .c_str());
+
   return KEY_MESSAGE;
 }
 
@@ -339,6 +345,11 @@ CdmResponseType CdmEngine::AddKey(const CdmSessionId& session_id,
     }
 
     id = iter->second.first;
+  } else {
+    LOGD("key data: (%zu) %s", key_data.size(),
+         wvcdm::Base64SafeEncode(
+             std::vector<uint8_t>(key_data.begin(), key_data.end()))
+             .c_str());
   }
 
   std::shared_ptr<CdmSession> session;