Changing the field of 'Value' in edify to std::string from char*. Meanwhile cleaning up the users of 'Value' and switching them to cpp style. Test: compontent tests passed. Bug: 31713288 Change-Id: Iec5a7d601b1e4ca40935bf1c70d325dafecec235
Bug: 28220065 Change-Id: Ida199c66692a1638be6990d583d2ed42583fb592
Mostly trivial changes to make cpp compiler happy. Change-Id: I69bd1d96fcccf506007f6144faf37e11cfba1270