cameraservice_test: Create host-side build.

Some tests can run on the host. This patch creates a new build on the
host with the ExifUtilsTest only. Additional tests will be added in
future patches.

Bug: 207411352
Test: Ran test on gLinux.
Change-Id: Ia1c04f1987b65f93519bacda98bafed1881f2386
diff --git a/camera/Android.bp b/camera/Android.bp
index 4ed3269..e44202b 100644
--- a/camera/Android.bp
+++ b/camera/Android.bp
@@ -113,6 +113,30 @@
 
 }
 
+cc_library_host_static {
+    name: "libcamera_client_host",
+
+    srcs: [
+        "CameraMetadata.cpp",
+        "VendorTagDescriptor.cpp",
+    ],
+
+    shared_libs: [
+        "libbase",
+        "libcamera_metadata",
+    ],
+
+    include_dirs: [
+        "system/media/private/camera/include",
+        "frameworks/native/include/media/openmax",
+    ],
+
+    export_include_dirs: [
+        "include",
+        "include/camera"
+    ],
+}
+
 // AIDL interface between camera clients and the camera service.
 filegroup {
     name: "libcamera_client_aidl",