[fdt] Add function to get the first range in /memory node of fdt

and test it. This function will be reused later in both pvmfw and
rialto.

Test: atest liblibfdt.integration_test
Test: atest vmbase_example.integration_test
Test: m pvmfw_img
Bug: 284462758
Change-Id: Ic547530f911281c2db14b9a59b7e2470be10361f
diff --git a/tests/hostside/Android.bp b/tests/hostside/Android.bp
index 873cc38..8478f98 100644
--- a/tests/hostside/Android.bp
+++ b/tests/hostside/Android.bp
@@ -3,21 +3,21 @@
 }
 
 genrule_defaults {
-    name: "test_avf_debug_policy_overlay",
+    name: "test_avf_dts_to_dtb",
     tools: ["dtc"],
     cmd: "$(location dtc) -I dts -O dtb $(in) -o $(out)",
 }
 
 genrule {
     name: "test_avf_debug_policy_with_adb",
-    defaults: ["test_avf_debug_policy_overlay"],
+    defaults: ["test_avf_dts_to_dtb"],
     srcs: ["assets/avf_debug_policy_with_adb.dts"],
     out: ["avf_debug_policy_with_adb.dtbo"],
 }
 
 genrule {
     name: "test_avf_debug_policy_without_adb",
-    defaults: ["test_avf_debug_policy_overlay"],
+    defaults: ["test_avf_dts_to_dtb"],
     srcs: ["assets/avf_debug_policy_without_adb.dts"],
     out: ["avf_debug_policy_without_adb.dtbo"],
 }