Use modern c++ code style for incidentd.

This cl does not contain code logic changes.

Bug: 77333635
Test: manual and incidentd_test
Change-Id: Iea0a402b1051defd45159ca267e6dd705f9ffa49
diff --git a/cmds/incidentd/src/Throttler.cpp b/cmds/incidentd/src/Throttler.cpp
index 1abf267..2b790ca 100644
--- a/cmds/incidentd/src/Throttler.cpp
+++ b/cmds/incidentd/src/Throttler.cpp
@@ -20,6 +20,10 @@
 
 #include <utils/SystemClock.h>
 
+namespace android {
+namespace os {
+namespace incidentd {
+
 Throttler::Throttler(size_t limit, int64_t refractoryPeriodMs)
     : mSizeLimit(limit),
       mRefractoryPeriodMs(refractoryPeriodMs),
@@ -48,3 +52,7 @@
     fprintf(out, "mRefractoryPeriodMs=%d\n", (int)mRefractoryPeriodMs);
     fprintf(out, "mLastRefractoryMs=%d\n", (int)mLastRefractoryMs);
 }
+
+}  // namespace incidentd
+}  // namespace os
+}  // namespace android
\ No newline at end of file