Remove apex framework jars from hard-coded list

All apex jars get auto-instrumented since
I2b1c0736202de26c5ea88c0ab14574bd7207a5fb

Test: $ EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true m nothing && \
      $ grep LOCAL_MODULE.*framework-sdkextensions.com.android.sdkext$ \
            out/soong/Android-aosp_coral.mk  -A9 -B2 | grep JACO
Change-Id: I1de5ba6673bef93b16c302412f920d93129d4420