Use String8/16 c_str [audio]

Bug: 295394788
Test: make checkbuild
Change-Id: Idd3610f6820093bd8710a401f87a136cc26279c5
diff --git a/services/medialog/MediaLogService.cpp b/services/medialog/MediaLogService.cpp
index 902af66..abe5f16 100644
--- a/services/medialog/MediaLogService.cpp
+++ b/services/medialog/MediaLogService.cpp
@@ -107,7 +107,7 @@
 
     if (args.size() > 0) {
         const String8 arg0(args[0]);
-        if (!strcmp(arg0.string(), "-r")) {
+        if (!strcmp(arg0.c_str(), "-r")) {
             // needed because mReaders is protected by mLock
             bool locked = dumpTryLock(mLock);
 
@@ -115,9 +115,9 @@
             if (!locked) {
                 String8 result(kDeadlockedString);
                 if (fd >= 0) {
-                    write(fd, result.string(), result.size());
+                    write(fd, result.c_str(), result.size());
                 } else {
-                    ALOGW("%s:", result.string());
+                    ALOGW("%s:", result.c_str());
                 }
                 return NO_ERROR;
             }