Move to our system/bt fork

Change-Id: I3e868512333d56850a7c686e8adb1497de163f36

default.xml

@@ -600,7 +600,7 @@
   </project>
   <project path="system/apex" name="platform/system/apex" groups="pdk" remote="aosp" />
   <project path="system/ashmemd" name="platform/system/ashmemd" groups="pdk" remote="aosp" />
-  <project path="system/bt" name="platform/system/bt" groups="pdk" remote="aosp" />
+  <project path="system/bt" name="LineageOS/android_system_bt" groups="pdk" />
   <project path="system/bpf" name="platform/system/bpf" groups="pdk" remote="aosp" />
   <project path="system/bpfprogs" name="platform/system/bpfprogs" groups="pdk" remote="aosp" />
   <project path="system/ca-certificates" name="platform/system/ca-certificates" groups="pdk" remote="aosp" />