DO NOT MERGE Change KernelUidCpuTimeReader Slog.wtf to Slog.e

There is a known issue in the kernel uidcputime module that triggers
the WTF, which has a cost to the system. Convert to a regular log
instead.

Bug:28950306
Change-Id: I7cbb3138f644075f0d9d65ce8b52bd835eb270fd

core/java/com/android/internal/os/KernelUidCpuTimeReader.java

@@ -120,7 +120,7 @@ public class KernelUidCpuTimeReader {
                             sb.append(" s=");
                             TimeUtils.formatDuration(systemTimeDeltaUs / 1000, sb);
                             sb.append(" p=").append(powerDeltaMaUs / 1000).append("mAms");
-                            Slog.wtf(TAG, sb.toString());
+                            Slog.e(TAG, sb.toString());
 
                             userTimeDeltaUs = 0;
                             systemTimeDeltaUs = 0;