Add Thread network HAL

Bug: b/203492431
Test: Build and run the VTS test and run otbr-agent on Android emulator.
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b82b0478059dd6203f43d5917558e34fd4ed44d5)
Merged-In: If58b5a8c75e40376ae6c6e93554afe750496308b
Change-Id: If58b5a8c75e40376ae6c6e93554afe750496308b
diff --git a/threadnetwork/aidl/default/threadnetwork-default.xml b/threadnetwork/aidl/default/threadnetwork-default.xml
new file mode 100644
index 0000000..d7dee1e
--- /dev/null
+++ b/threadnetwork/aidl/default/threadnetwork-default.xml
@@ -0,0 +1,6 @@
+<manifest version="1.0" type="device">
+    <hal format="aidl">
+        <name>android.hardware.threadnetwork</name>
+        <fqname>IThreadChip/chip0</fqname>
+    </hal>
+</manifest>