Use String8/16 c_str

Bug: 295394788
Test: make checkbuild
Change-Id: I538720d4de2dcc038b417048209782ff605b7e30
diff --git a/libs/incident/src/IncidentReportArgs.cpp b/libs/incident/src/IncidentReportArgs.cpp
index d344a981..858813f 100644
--- a/libs/incident/src/IncidentReportArgs.cpp
+++ b/libs/incident/src/IncidentReportArgs.cpp
@@ -152,8 +152,8 @@
     }
     mPrivacyPolicy = privacyPolicy;
 
-    mReceiverPkg = String8(in->readString16()).string();
-    mReceiverCls = String8(in->readString16()).string();
+    mReceiverPkg = String8(in->readString16()).c_str();
+    mReceiverCls = String8(in->readString16()).c_str();
 
     int32_t gzip;
     err = in->readInt32(&gzip);