isServiceConnected() was being called before uses of getTelecomService() to ensure that the service was connected before accessing it. However, isServiceConnected() used getTelecomService() to check if the service was connected, resulting in unnecessary binder calls. Bug: 173036057 Bug: 173039862 Test: manual testing (switching between different tabs, calling) Change-Id: I622464927826d8af1c6e75ed4557580d8723315c