Refactored counting idle time.

- psIdleTime() was replaced with Platform::LastUserInputTime().
 - _lastTimeVideoPlayedAt was moved to Application as _lastNonIdleTime.
 - Call of updateNonIdle() was added while voice is recording.
 - Fixed #5695.
 - Thanks Preston. =)

Telegram/SourceFiles/core/application.cpp

@@ -841,6 +841,14 @@ bool Application::passcodeLocked() const {
 	return _passcodeLock.current();
 }
 
+void Application::updateNonIdle() {
+	_lastNonIdleTime = crl::now();
+}
+
+crl::time Application::lastNonIdleTime() const {
+	return std::max(Platform::LastUserInputTime(), _lastNonIdleTime);
+}
+
 rpl::producer<bool> Application::passcodeLockChanges() const {
 	return _passcodeLock.changes();
 }