android/README: Add "Customization" section

diff --git a/android/README b/android/README
index 7d1f415..b9b602e 100644 (file)
--- a/android/README
+++ b/android/README
@@ -153,6 +153,26 @@ system properties called: persist.sys.bluetooth.mgmtdbg
 Note: Debugs are only available on NON USER build variants
 
 
+Customization
+-------------
+
+It is possible to customize BlueZ for Android through Android system properties.
+This may include enabling extra profiles or features inside HALs implementation
+These properties are read on Bluetooth stack startup only and require stack
+restart if changed. All customization properties names start with
+"persist.sys.bluetooth." followed by specific HAL name e.g.
+"persist.sys.bluetooth.handsfree". This section list available customization
+options.
+
+Property       Value           Description
+-------------------------------------------
+handsfree      hfp             Enable Handsfree Profile (HFP) with narrowband
+                               speech only
+               hfp_wbs         Enable Handsfree Profile (HFP) with narrowband
+                               and wideband speech support
+               <none>          Don't enable Handsfree Profile (HFP)
+
+
 Building and running on Linux
 -----------------------------