ipacm: convert Android.mk files to Android.bp

As part of soong modernisation, requirement is to use
Android.bp framework instead of Android.mk. Make changes
to convert Android.mk to Android.bp files.

Change-Id: I8f2d40159360afd0631c0c50cb823455a45396ef
diff --git a/hal/Android.bp b/hal/Android.bp
new file mode 100644
index 0000000..f7559b2
--- /dev/null
+++ b/hal/Android.bp
@@ -0,0 +1,28 @@
+cc_library_shared {
+    name: "liboffloadhal",
+    srcs: [
+        "src/CtUpdateAmbassador.cpp",
+        "src/HAL.cpp",
+        "src/IpaEventRelay.cpp",
+        "src/LocalLogBuffer.cpp",
+        "src/OffloadStatistics.cpp",
+        "src/PrefixParser.cpp",
+    ],
+
+    shared_libs: [
+        "libhwbinder",
+        "libhidlbase",
+        "libhidltransport",
+        "liblog",
+        "libcutils",
+        "libdl",
+        "libbase",
+        "libutils",
+        "libhardware_legacy",
+        "libhardware",
+        "android.hardware.tetheroffload.config@1.0",
+        "android.hardware.tetheroffload.control@1.0",
+    ],
+    export_include_dirs: ["inc"],
+    vendor: true,
+}