release: AM++ 1.4.0

[Zennmn]

Summary

• animate lyric blur transitions from a non-zero radius to clear over the existing 300ms frame transition
• stop settled blur transitions from re-arming Choreographer frames
• bump the module to version 1.4.0 (versionCode 97)

Validation

• :app:testDebugUnitTest --offline --no-daemon
• :app:assembleDebug --offline --no-daemon
• :app:assembleRelease --offline --no-daemon
• :app:lintVitalRelease --offline --no-daemon
• git diff --check