Merge "Allow input device config files in product and system_ext." into sc-dev

    // Search system repository.

    std::string path;

    // Treblized input device config files will be located /odm/usr or /vendor/usr.

    const char *rootsForPartition[] {"/odm", "/vendor", getenv("ANDROID_ROOT")};

    // Treblized input device config files will be located /product/usr, /system_ext/usr,

    // /odm/usr or /vendor/usr.

    const char* rootsForPartition[]{"/product", "/system_ext", "/odm", "/vendor",

                                    getenv("ANDROID_ROOT")};

    for (size_t i = 0; i < size(rootsForPartition); i++) {

        if (rootsForPartition[i] == nullptr) {

            continue;