Update CRT and bug fixes

What's Changed

• Android keychain sample by @sbSteveK in #544
• Add migration guide from V1 SDK by @sfod in #533
• Android api 24 support by @sbSteveK in #546
• Mqt311 connection methods by @sfod in #541
• Android Test Asset Setup by @sbSteveK in #551
• Add Android Custom Key Ops Test by @sbSteveK in #552
• Use aws-actions/configure-aws-credentials@v2 by @sfod in #554
• update crt version by @sbSteveK in #555
• AutoTag PR for v1.20.1 by @bretambrose in #556

Full Changelog: v1.20.0...v1.20.1