Refactor the soong.config loading code to support reading in product variables from soong.variables. Change-Id: I389e6bb5c501b53167267d5f5d0d25557811cf72
Refactor the soong.config loading code to support reading in product variables from soong.variables. Change-Id: I389e6bb5c501b53167267d5f5d0d25557811cf72