Use String8/16 c_str [audio]

Bug: 295394788
Test: make checkbuild
Change-Id: Idd3610f6820093bd8710a401f87a136cc26279c5
Merged-In: Idd3610f6820093bd8710a401f87a136cc26279c5
diff --git a/services/audiopolicy/service/AudioPolicyClientImpl.cpp b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
index 290db97..dd06bd5 100644
--- a/services/audiopolicy/service/AudioPolicyClientImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
@@ -194,7 +194,7 @@
                    const String8& keyValuePairs,
                    int delay_ms)
 {
-    mAudioPolicyService->setParameters(io_handle, keyValuePairs.string(), delay_ms);
+    mAudioPolicyService->setParameters(io_handle, keyValuePairs.c_str(), delay_ms);
 }
 
 String8 AudioPolicyService::AudioPolicyClient::getParameters(audio_io_handle_t io_handle,