Use String8/16 c_str [tools]

Bug: 295394788
Test: make checkbuild
Change-Id: I82d6899d8c15a10b15399c39177290012bb5f13b
Merged-In: I82d6899d8c15a10b15399c39177290012bb5f13b
diff --git a/tools/aapt/Symbol.h b/tools/aapt/Symbol.h
index e157541..de1d60c 100644
--- a/tools/aapt/Symbol.h
+++ b/tools/aapt/Symbol.h
@@ -68,9 +68,9 @@
 
 android::String8 Symbol::toString() const {
     return android::String8::format("%s:%s/%s (0x%08x)",
-            android::String8(package).string(),
-            android::String8(type).string(),
-            android::String8(name).string(),
+            android::String8(package).c_str(),
+            android::String8(type).c_str(),
+            android::String8(name).c_str(),
             (int) id);
 }