adb: switch skip_host_serial to string_view.

Rename it to something more appropriate, while we're at it.

Test: test_adb.py
Test: test_device.py
Test: $ANDROID_HOST_OUT/nativetest64/adb_test/adb_test
Test: adb shell /data/nativetest64/adbd_test/adbd_test
Change-Id: I0f95d348eeacb45a810696d748c8340d2068f666
diff --git a/socket.h b/socket.h
index f9ad4f8..0392731 100644
--- a/socket.h
+++ b/socket.h
@@ -113,7 +113,8 @@
 namespace internal {
 
 #if ADB_HOST
-char* skip_host_serial(char* service);
+bool parse_host_service(std::string_view* out_serial, std::string_view* out_command,
+                        std::string_view service);
 #endif
 
 }  // namespace internal