Resolve "crash in SBA decoder with dtx"

Closes #695 (closed)

[x] The crash occurs due to assertion issue caused by L_shl for values just above 0.5 in Q27 when left shifted by 5, which was not handled in the EVS implemented hq_generic_decoding_fx(). The order of multiply and left shift was altered with which issue was resolved. If issue occurs again, copy of hq_bwe_fx and hq_generic_decoding_fx for IVAS needs to be created.