MH2 | Implement debug method of HalProxy

Bug: 9569382
Test: Observed debug output from
$ adb shell lshal debug android.hardware.sensors@2.0::ISensors/default
Change-Id: I9f2627a05d37bd8407a22e263b7557834a9677b8
diff --git a/sensors/2.0/multihal/Android.bp b/sensors/2.0/multihal/Android.bp
index 5c67676..c13eaf2 100644
--- a/sensors/2.0/multihal/Android.bp
+++ b/sensors/2.0/multihal/Android.bp
@@ -21,6 +21,7 @@
     shared_libs: [
         "android.hardware.sensors@1.0",
         "android.hardware.sensors@2.0",
+        "libbase",
         "libcutils",
         "libfmq",
         "libhidlbase",