(DNM) pipa: peripheralmanager: Reimplement angle detection

Thanks luka177 for the code for retrieving the accelerometer data from the KB. This is mostly WIP overall, but it does seem to work *okay*.

peripheralmanager/Android.bp

@@ -46,4 +46,10 @@ cc_binary {
         "liblog",
         "libsensorndkbridge",
     ],
+
+    arch: {
+        arm: {
+            cflags: ["-mfpu=neon", "-mfloat-abi=softfp"],
+        },
+    },
 }