ART: Fix signal_dumper detection in run-test

Fix the testing APEX name to com.android.art.

If asked to run under chroot, only look into paths under the chroot. That
means we can no longer use PATH lookup as fallback. Hardcode /system/bin
instead.

Bug: 140935398
Test: chroot test
Change-Id: Ief33714c0662ff4b254f8bcc556b8be558d92e2c
1 file changed