Bluetooth: improve getLeMaximumAdvertisingDataLength comment

Bug: 37534792
Test: none
Change-Id: Ieff71356aceb0e2a4c6e81d9053f854448e0c927
(cherry picked from commit 4634b5cd27b274105e550f58f9d5fc51c79eb3fb)
diff --git a/framework/java/android/bluetooth/BluetoothAdapter.java b/framework/java/android/bluetooth/BluetoothAdapter.java
index 845a47d..1aca1d1 100644
--- a/framework/java/android/bluetooth/BluetoothAdapter.java
+++ b/framework/java/android/bluetooth/BluetoothAdapter.java
@@ -1484,8 +1484,8 @@
     }
 
     /**
-     * Return the maximum LE advertising data length,
-     * if LE Extended Advertising feature is supported.
+     * Return the maximum LE advertising data length in bytes,
+     * if LE Extended Advertising feature is supported, 0 otherwise.
      *
      * @return the maximum LE advertising data length.
      */