Use String8/16 c_str [tools]

Bug: 295394788
Test: make checkbuild
Change-Id: I82d6899d8c15a10b15399c39177290012bb5f13b
Merged-In: I82d6899d8c15a10b15399c39177290012bb5f13b
diff --git a/tools/aapt2/Debug.cpp b/tools/aapt2/Debug.cpp
index f47d66e..3fa3900 100644
--- a/tools/aapt2/Debug.cpp
+++ b/tools/aapt2/Debug.cpp
@@ -445,7 +445,7 @@
   const size_t NS = pool->size();
   for (size_t s=0; s<NS; s++) {
     auto str = pool->string8ObjectAt(s);
-    printer->Print(StringPrintf("String #%zd : %s\n", s, str.has_value() ? str->string() : ""));
+    printer->Print(StringPrintf("String #%zd : %s\n", s, str.has_value() ? str->c_str() : ""));
   }
 }