[Thread] add system API setChannelMaxPowers

The `setChannelMaxPowers` allows privilege app to set the max
power of each channel. It is going to be used for controlling the
output power of the Thread radio chip.

Bug: b/320594263
Test: atest ThreadNetworkUnitTests && atest CtsThreadNetworkTestCases

Change-Id: Ic47eccd6de2da0e6cdb8f21d5b4df156b1f11747
diff --git a/thread/framework/Android.bp b/thread/framework/Android.bp
index 846253c..f8fe422 100644
--- a/thread/framework/Android.bp
+++ b/thread/framework/Android.bp
@@ -30,3 +30,14 @@
         "//packages/modules/Connectivity:__subpackages__",
     ],
 }
+
+filegroup {
+    name: "framework-thread-ot-daemon-shared-aidl-sources",
+    srcs: [
+        "java/android/net/thread/ChannelMaxPower.aidl",
+    ],
+    path: "java",
+    visibility: [
+        "//external/ot-br-posix:__subpackages__",
+    ],
+}