Use String8/16 c_str [camera]

Bug: 295394788
Test: make checkbuild
Change-Id: I321053f5a82ca2e1ad9ea447f96e81a87c3fcfe0
diff --git a/camera/ndk/impl/ACameraManager.cpp b/camera/ndk/impl/ACameraManager.cpp
index e715c22..3ecf845 100644
--- a/camera/ndk/impl/ACameraManager.cpp
+++ b/camera/ndk/impl/ACameraManager.cpp
@@ -167,7 +167,7 @@
                 } else {
                     VendorTagDescriptorCache::clearGlobalVendorTagCache();
                     ALOGE("%s: Failed to setup vendor tag cache: %s",
-                            __FUNCTION__, res.toString8().string());
+                            __FUNCTION__, res.toString8().c_str());
                 }
             }
         } else if (ret.serviceSpecificErrorCode() ==
@@ -177,7 +177,7 @@
             VendorTagDescriptor::clearGlobalVendorTagDescriptor();
         } else {
             ALOGE("%s: Failed to get vendor tag descriptors: %s",
-                    __FUNCTION__, ret.toString8().string());
+                    __FUNCTION__, ret.toString8().c_str());
         }
     }
     ALOGE_IF(mCameraService == nullptr, "no CameraService!?");
@@ -708,7 +708,7 @@
                 return ACAMERA_ERROR_INVALID_PARAMETER;
             default:
                 ALOGE("Get camera characteristics from camera service failed: %s",
-                        serviceRet.toString8().string());
+                        serviceRet.toString8().c_str());
                 return ACAMERA_ERROR_UNKNOWN; // should not reach here
         }
     }
@@ -752,7 +752,7 @@
             targetSdkVersion, /*overrideToPortrait*/false, /*out*/&deviceRemote);
 
     if (!serviceRet.isOk()) {
-        ALOGE("%s: connect camera device failed: %s", __FUNCTION__, serviceRet.toString8().string());
+        ALOGE("%s: connect camera device failed: %s", __FUNCTION__, serviceRet.toString8().c_str());
         // Convert serviceRet to camera_status_t
         switch(serviceRet.serviceSpecificErrorCode()) {
             case hardware::ICameraService::ERROR_DISCONNECTED: