Fix NPE in `dumpsys batterystats` when `streamlined_battery_stats` is disabled

Bug: 308999321
Test: adb shell device_config put backstage_power com.android.server.power.optimization.streamlined_battery_stats false
      adb shell dumpsys batterystats

Change-Id: Icd965c5ebadafd31e88a44099fb5c23ae214c141

1 files changed, 4 insertions, 0 deletions

diff --git a/services/core/java/com/android/server/power/stats/CpuPowerStatsCollector.java b/services/core/java/com/android/server/power/stats/CpuPowerStatsCollector.java
index a388932cb708..b8e581f32a58 100644
--- a/services/core/java/com/android/server/power/stats/CpuPowerStatsCollector.java
+++ b/services/core/java/com/android/server/power/stats/CpuPowerStatsCollector.java
@@ -592,6 +592,10 @@ public class CpuPowerStatsCollector extends PowerStatsCollector {
     public void dumpCpuPowerBracketsLocked(PrintWriter pw) {
         ensureInitialized();
 
+        if (mLayout == null) {
+            return;
+        }
+
         pw.println("CPU power brackets; cluster/freq in MHz(avg current in mA):");
         for (int bracket = 0; bracket < mLayout.getCpuPowerBracketCount(); bracket++) {
             pw.print("    ");