cameraservice_test: Add DistortionMapperTest to the host build.

DistortionMapperTest depends on SessionConfigurationUtils, but uses
parts of it that do not rely on a HAL or other device-side information
(components in the android::hardware namespace). This change splits up
SessionConfiguration utils into two files so that functions that do not
rely on a HAL are not bundled with those that do.

Bug: 207411352
Test: Ran test on gLinux.
Change-Id: Iaeeab4ee68044984425a9918a58aa6ce18fc8de4
diff --git a/services/camera/libcameraservice/common/CameraProviderManager.cpp b/services/camera/libcameraservice/common/CameraProviderManager.cpp
index d37d717..2cdf696 100644
--- a/services/camera/libcameraservice/common/CameraProviderManager.cpp
+++ b/services/camera/libcameraservice/common/CameraProviderManager.cpp
@@ -46,7 +46,7 @@
 
 using namespace ::android::hardware::camera;
 using namespace ::android::hardware::camera::common::V1_0;
-using camera3::SessionConfigurationUtils;
+using namespace ::android::camera3;
 using std::literals::chrono_literals::operator""s;
 using hardware::camera2::utils::CameraIdAndSessionConfiguration;
 using hardware::camera::provider::V2_7::CameraIdAndStreamCombination;