samsung: Import pixel soong namespaces in root Android.bp

* Both power and thermal HAL need it now

Change-Id: Ifd414b778d91410a0cbb8f36bfb6481603fb6128
diff --git a/Android.bp b/Android.bp
index 9515b25..f4fc009 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,2 +1,6 @@
 soong_namespace {
+    imports: [
+        "hardware/google/pixel",
+        "hardware/google/interfaces",
+    ],
 }
diff --git a/aidl/power-libperfmgr/Android.bp b/aidl/power-libperfmgr/Android.bp
index 2c3bb2a..258a2d1 100644
--- a/aidl/power-libperfmgr/Android.bp
+++ b/aidl/power-libperfmgr/Android.bp
@@ -13,13 +13,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-soong_namespace {
-    imports: [
-        "hardware/google/pixel",
-        "hardware/google/interfaces",
-    ],
-}
-
 cc_binary {
     name: "android.hardware.power-service.samsung-libperfmgr",
     relative_install_path: "hw",