Add extra frame when dex_pc is non-zero.

Use the art dex file library to read the dex data.

Add unit tests for the UnwindDexFile code.

Bug: 72070049

Test: All unit tests continue to pass.
Test: Dumped the backtrace of the 137-cfi test while running in interpreter
Test: mode and verified that the stack trace is correct. Did this on host
Test: and for arm/arm64.

Change-Id: Ia6f343318c5dd6968a954015a7d59fdf101575b0