Fix power measurement with dumpsys when the format is unrecognized.

tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor.py

Index: tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor.py
diff --git a/tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor.py b/tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor.py
index fae8a47ff1605ba584fcc2252d63cd23dcbbd4be..0e7cef57b2b51a6669c84ce983a011fb6f60b80c 100644
--- a/tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor.py
+++ b/tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor.py
@@ -4,6 +4,7 @@
 
 import telemetry.core.platform.power_monitor as power_monitor
 
+import logging
 import csv
 
 from collections import defaultdict
@@ -58,6 +59,11 @@ class DumpsysPowerMonitor(power_monitor.PowerMonitor):
     Returns:
         Dictionary in the format returned by StopMonitoringPower().
     """
+    # Raw power usage samples.
+    out_dict = {}
+    out_dict['identifier'] = 'dumpsys'
+    out_dict['power_samples_mw'] = []
+
     # csv columns
     DUMP_VERSION_INDEX = 0
     COLUMN_TYPE_INDEX = 3
@@ -73,7 +79,10 @@ class DumpsysPowerMonitor(power_monitor.PowerMonitor):
         continue
       entries_by_type[entry[COLUMN_TYPE_INDEX]].append(entry)
     # Find the uid of for the given package.
-    assert package in entries_by_type, 'Expected package not found'
+    if not package in entries_by_type:
+      logging.warning('Unable to parse dumpsys output. Please upgrade the OS.')
+      out_dict['energy_consumption_mwh'] = 0
+      return out_dict
     assert len(entries_by_type[package]) == 1, 'Multiple entries for package.'
     uid = entries_by_type[package][0][PACKAGE_UID_INDEX]
     consumptions_mah = [float(entry[PWI_POWER_COMSUMPTION_INDEX])
@@ -85,9 +94,5 @@ class DumpsysPowerMonitor(power_monitor.PowerMonitor):
     # Converting at a nominal voltage of 4.0V, as those values are obtained by a
     # heuristic, and 4.0V is the voltage we set when using a monsoon device.
     consumption_mwh = consumption_mah * 4.0
-    # Raw power usage samples.
-    out_dict = {}
-    out_dict['identifier'] = 'dumpsys'
-    out_dict['power_samples_mw'] = []
     out_dict['energy_consumption_mwh'] = consumption_mwh
     return out_dict