Allow apps to access the graphic allocator HAL

Test: take a screenshot
Test: run CTS ImageReaderTest
Bug: 36194109

(cherry picked from commit 49ed0cd65849d29e5f1cd49b18e2e46de366b577)

Change-Id: I331bce37b35e30084ba9f7ecd063a344a79c5232
1 file changed