Enable ABSL_FLAGS flag registration for onnxruntime_perf_test for mobile build (#25849)
### Description
`ABSL_FLAGS_STRIP_NAMES `is set to 1 by default to disable flag
registration when building for Android, iPhone, and "embedded devices".
So, running onnxruntime_perf_test on Android will see that flags are not
registered.
<img width="872" height="182" alt="image (2)"
src="https://github.com/user-attachments/assets/eb6a6772-cdff-4d60-a3c7-4352477e956c"
/>
Set `ABSL_FLAGS_STRIP_NAMES ` to 0 by default for all builds.