Rewrite snapshot dependencies for vndk-ext

VNDK-ext libraries have dependency on VNDK libraries. When building
against snapshots, the dependency must be rewritten with the
snapshots.

Bug: 194864314
Test: m nothing
Change-Id: I1244c6a6590e89b344ab39514bb5142d36b04268

cc/cc.go

@@ -2312,7 +2312,7 @@ func (c *Module) DepsMutator(actx android.BottomUpMutatorContext) {
 			actx.AddVariationDependencies([]blueprint.Variation{
 				c.ImageVariation(),
 				{Mutator: "link", Variation: "shared"},
-			}, vndkExtDepTag, vndkdep.getVndkExtendsModuleName())
+			}, vndkExtDepTag, RewriteSnapshotLib(vndkdep.getVndkExtendsModuleName(), GetSnapshot(c, &snapshotInfo, actx).SharedLibs))
 		}
 	}
 }

cc/vendor_snapshot_test.go

@@ -459,6 +459,19 @@ func TestVendorSnapshotUse(t *testing.T) {
 		srcs: ["client.cpp"],
 	}
 
+	cc_library_shared {
+		name: "libvndkext",
+		vendor: true,
+		nocrt: true,
+		no_libcrt: true,
+		stl: "none",
+		system_shared_libs: [],
+		vndk: {
+			extends: "libvndk",
+			enabled: true,
+		}
+	}
+
 	cc_binary {
 		name: "bin_without_snapshot",
 		vendor: true,