Improve logging when using ingress rate limits

Add some happy path logging that informs about active rate limits.

Test: TreeHugger
Bug: 218840346
Change-Id: Iddd50583ca2e90afe83a5c68611418fa794afb3f
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 008f866..c323f2f 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -1409,6 +1409,8 @@
                 // converting rateInBytesPerSecond from long to int is safe here because the
                 // setting's range is limited to INT_MAX.
                 // TODO: add long/uint64 support to tcFilterAddDevIngressPolice.
+                Log.i(TAG,
+                        "enableIngressRateLimit on " + iface + ": " + rateInBytesPerSecond + "B/s");
                 TcUtils.tcFilterAddDevIngressPolice(params.index, TC_PRIO_POLICE, (short) ETH_P_ALL,
                         (int) rateInBytesPerSecond, TC_POLICE_BPF_PROG_PATH);
             } catch (IOException e) {
@@ -1430,6 +1432,8 @@
                 return;
             }
             try {
+                Log.i(TAG,
+                        "disableIngressRateLimit on " + iface);
                 TcUtils.tcFilterDelDev(params.index, true, TC_PRIO_POLICE, (short) ETH_P_ALL);
             } catch (IOException e) {
                 loge("TcUtils.tcFilterDelDev(ifaceIndex=" + params.index