[ingolfurbjargmundsson-star]

Summary

Fixes MediaPipe object detection failing to initialize in R8-optimized release builds of LensCast v0.1.7.

The fix preserves Google Flogger's stack-based caller lookup and protobuf fields accessed through reflection by adding keep rules to app/proguard-rules.pro.

Root cause

The original release failed with:

ExceptionInInitializerError
Caused by: IllegalStateException:
no caller found on the stack for: uk1

Preserving Flogger resolved the first error but exposed a second:

RuntimeException:
Field typeUrl_ for com.google.protobuf.Any not found

Adding the protobuf keep rule resolved this failure.

Verification

Tested on a Samsung Galaxy S10+ running Android 12:

• Original optimized release reproduced the failure.
• Unoptimized debug build initialized successfully.
• Patched optimized release initialized successfully with R8 still enabled.
• Detection events correctly included person labels.
• Successful initialization was verified after two additional app restarts.
• Original LensCast installation and recordings were preserved.

The protobuf rule is intentionally conservative and could be narrowed with further regression testing.

Fixes #12