libbinder: move interruptableReadOrWrite to new file

Moves interruptableReadOrWrite to a new RpcTransportUtils.h
file so it can be used by multiple transports.

Bug: 224644083
Test: m
Change-Id: Ife48519ab5c6a99d5fbbcd4ad9e6c3fe517dd0ba
diff --git a/libs/binder/FdTrigger.h b/libs/binder/FdTrigger.h
index 5c7102e..a25dc11 100644
--- a/libs/binder/FdTrigger.h
+++ b/libs/binder/FdTrigger.h
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#pragma once
 
 #include <memory>