Only coverage instrument device modules that are being compiled to dex

There's no reason to instrument device modules that are not being
compiled to dex with jacoco, as they can't be installed on the device
if they only have class files, and modules that depend on it will
get the pre-instrumented jar.

Bug: 372543712
Test: TestCoverage
Change-Id: I10d5fb2eeb1f1acf6393603b5219685bf22f327c