Save usage information before closing a session

[ Merge of http://go/wvgerrit/48640 ]

Usage information is saved periodically, in order to avoid excessive
flash writes. This limits our session usage accuracy to
within a usage save period. Saving usage information when
closing a session is an improvement and addresses some failures
seen with Netflix compliance tests.

Bug: 74015553
Test: WV unit/integration tests
Change-Id: I680aad05922f334df0611ff3933082a512f7c002

libwvdrmengine/cdm/core/src/cdm_session.cpp

@@ -54,6 +54,12 @@ CdmSession::CdmSession(FileSystem* file_system,
 }
 
 CdmSession::~CdmSession() {
+  if (usage_support_type_ == kUsageEntrySupport &&
+      has_provider_session_token() &&
+      usage_table_header_ != NULL) {
+    UpdateUsageEntryInformation();
+  }
+
   if (!key_set_id_.empty()) {
     // Unreserve the license ID.
     file_handle_->UnreserveLicenseId(key_set_id_);