display: Add hashing for mapper@4.0

Change-Id: Id2a481cc5e84341bbeaf4c21c75e83e1cd96bfde
diff --git a/display/current.txt b/display/current.txt
index b1df23a..d7e5a02 100644
--- a/display/current.txt
+++ b/display/current.txt
@@ -70,3 +70,4 @@
 7f8c47a47524e1ac21646578c7545fffdc08cec60df37d28ce8796b6461ef0c2 vendor.qti.hardware.display.composer@3.0::IQtiComposer
 f724000c84dd66ffaea8b3edc610f13381a62513854e35d89b3f4a4daad620d0 vendor.qti.hardware.display.composer@3.0::IQtiComposerClient
 c85fce19541fb31c8ce4927166a4b50da1e5d50a98594bcaae2f8b2eec12fb7d vendor.qti.hardware.display.allocator@4.0::IQtiAllocator
+f49205d41f011a96c6d238ea69f7b6c9d159809f4ecabef04ca4ccdb195d57b5 vendor.qti.hardware.display.mapper@4.0::IQtiMapper