Don't depend on String8 cast to C string

Bug: 295394788
Test: m checkbuild
Change-Id: I6aa039b6b2a4944e3537ef133f8785890d957edd
diff --git a/cmds/incidentd/src/IncidentService.cpp b/cmds/incidentd/src/IncidentService.cpp
index 53c7b74..82c8707 100644
--- a/cmds/incidentd/src/IncidentService.cpp
+++ b/cmds/incidentd/src/IncidentService.cpp
@@ -563,7 +563,7 @@
                 fprintf(out, "Not enough arguments for section\n");
                 return NO_ERROR;
             }
-            int id = atoi(args[1]);
+            int id = atoi(args[1].c_str());
             int idx = 0;
             while (SECTION_LIST[idx] != NULL) {
                 const Section* section = SECTION_LIST[idx];