config: Add common config for book-style foldables

Book-style foldables like the Pixel Fold, Galaxy Z Fold and Xiaomi MIX
Fold series have two displays: one primary, near tablet-sized inner
panel and a smaller, phone-sized outer panel.

These devices need a combination of configs to enable both phone- and
tablet-targeted features. Therefore, add a config file merging contents
of the common phone and tablet configs.

Change-Id: Ibf89e4336fa119ebfb79aad8dac4266fd4972985
Signed-off-by: Jens Reidel <adrian@travitia.xyz>

config/common_full_foldable_book_telephony.mk

@@ -0,0 +1,11 @@
+# Inherit mobile full common Lineage stuff
+$(call inherit-product, vendor/lineage/config/common_mobile_full.mk)
+
+# Enable support of one-handed mode
+PRODUCT_PRODUCT_PROPERTIES += \
+    ro.support_one_handed_mode?=true
+
+# Inherit tablet common Lineage stuff
+$(call inherit-product, vendor/lineage/config/tablet.mk)
+
+$(call inherit-product, vendor/lineage/config/telephony.mk)