openharmony-image-*: Extract images common parts

Include file with common definitions to avoid duplication.

Signed-off-by: Robert Drab <robert.drab@huawei.com>

meta-ohos-core/recipes-core/images/openharmony-image-base.bb

 # Base this image on core-image-base
-include recipes-core/images/core-image-base.bb
-
-IMAGE_INSTALL_append = " \
-			packagegroup-net-essentials \
-			packagegroup-net-tools \
-			packagegroup-ble-essentials \
-			"
+require recipes-core/images/core-image-base.bb
+require openharmony-image-common.inc

meta-ohos-core/recipes-core/images/openharmony-image-common.inc

+# Common settings for all OpenHarmony images
+
+IMAGE_INSTALL_append = "\
+			packagegroup-net-essentials \
+			packagegroup-net-tools \
+			packagegroup-ble-essentials \
+			"

meta-ohos-core/recipes-core/images/openharmony-image-extra.bb

 # Base this image on core-image-weston
-include recipes-graphics/images/core-image-weston.bb
-
-IMAGE_INSTALL_append = " \
-			packagegroup-net-essentials \
-			packagegroup-net-tools \
-			packagegroup-ble-essentials \
-			"
+require recipes-graphics/images/core-image-weston.bb
+require openharmony-image-common.inc