v19.1.0 - Bug fixes

Full changelog

• Fixed a crash calling start on a timing distribution metric before Glean is initialized.
  Timings are always measured, but only recorded when upload is enabled (#400)
• BUGFIX: When the Debug Activity is used to log pings, each ping is now logged only once (#407)
• New invalid state error, used in timespan recording (#230)
• Add an Android crash instrumentation walkthrough (#399)
• Fix crashing bug by avoiding assert-printing in lmdb (#422)
• Upgrade dependencies, including rkv (#416)