Replace libchrome StringPrintf in system/bta/test/ files

This change is to remove the direct dependency on libchrome.
Replaces StringPrintf in <base/strings/stringprintf.h>
with android::base::StringPrintf in <android-base/stringprintf.h>.
This change is very mechanical, no change in program behavior.

Test: m .
Bug: 360917504
Change-Id: I168437505d6e82c7c964e7e01765a521cb72ca9f