Add LE connection interval sysprops

These will replace the current two sysprops below:
- min_connection_interval
- max_connection_interval
when the flag initial_conn_params_p1 is enabled.

Bug: 308483803
Bug: 378595485
Test: Manual
Change-Id: I0c7f1aa0679a9dec24ed5d6c01b92f749db59357

srcs/android/sysprop/BluetoothProperties.sysprop

diff --git a/srcs/android/sysprop/BluetoothProperties.sysprop b/srcs/android/sysprop/BluetoothProperties.sysprop
index 1718212..6d987b9 100644
--- a/srcs/android/sysprop/BluetoothProperties.sysprop
+++ b/srcs/android/sysprop/BluetoothProperties.sysprop
@@ -707,6 +707,36 @@
     prop_name: "bluetooth.core.le.connection_supervision_timeout"
 }
 
+# LE connection intervals which replace the above (min/max)_connection_interval
+prop {
+    api_name: "getLeMinConnectionIntervalRelaxed"
+    type: UInt
+    scope: Internal
+    access: Readonly
+    prop_name: "bluetooth.core.le.min_connection_interval_relaxed"
+}
+prop {
+    api_name: "getLeMaxConnectionIntervalRelaxed"
+    type: UInt
+    scope: Internal
+    access: Readonly
+    prop_name: "bluetooth.core.le.max_connection_interval_relaxed"
+}
+prop {
+    api_name: "getLeMinConnectionIntervalAggressive"
+    type: UInt
+    scope: Internal
+    access: Readonly
+    prop_name: "bluetooth.core.le.min_connection_interval_aggressive"
+}
+prop {
+    api_name: "getLeMaxConnectionIntervalAggressive"
+    type: UInt
+    scope: Internal
+    access: Readonly
+    prop_name: "bluetooth.core.le.max_connection_interval_aggressive"
+}
+
 # Direct connection timeout in ms
 prop {
     api_name: "getLeDirectConnectionTimeout"