libbatterymonitor: vendor_available

libbatterymonitor is a static library.
Also removed unused libbinder dependency.

Test: pass
Change-Id: I1f17ee643e6ed1bb2c11a6f3189a448dba2927ac
diff --git a/healthd/Android.bp b/healthd/Android.bp
index 56f5148..7269b62 100644
--- a/healthd/Android.bp
+++ b/healthd/Android.bp
@@ -5,3 +5,16 @@
     header_libs: ["libbatteryservice_headers"],
     export_header_lib_headers: ["libbatteryservice_headers"],
 }
+
+cc_library_static {
+    name: "libbatterymonitor",
+    srcs: ["BatteryMonitor.cpp"],
+    vendor_available: true,
+    export_include_dirs: ["include"],
+    shared_libs: [
+        "libutils",
+        "libbase",
+    ],
+    header_libs: ["libhealthd_headers"],
+    export_header_lib_headers: ["libhealthd_headers"],
+}