gralloc: Add QtiMapperExtensions

This change moves extensions to QtiMapperExtensions to decouple
it from IMapper revisions. The function
QtiMapper::getMapperExtensions() is used to access the extensions
through a mapper instance. QtiMapper revision is incremented to
2.0 to reflect the change.

CRs-Fixed: 2451975
Change-Id: I7043bd380e9b7b3ea8d9bac4da3e886a5d46b631
diff --git a/config/display-product.mk b/config/display-product.mk
index 0cd0c66..03e17de 100644
--- a/config/display-product.mk
+++ b/config/display-product.mk
@@ -3,7 +3,7 @@
     android.hardware.graphics.composer@2.3-impl \
     android.hardware.graphics.composer@2.3-service \
     android.hardware.graphics.mapper@2.0-impl-qti-display \
-    vendor.qti.hardware.display.allocator@1.0-service \
+    vendor.qti.hardware.display.allocator-service \
     android.hardware.memtrack@1.0-impl \
     android.hardware.memtrack@1.0-service \
     android.hardware.light@2.0-impl \