dumpsys: fix problems with -a option in battery and batteryinfo services

Now the dumpsys battery output will show up in bugreports again.

Change-Id: Id36e87d27e9d3c06dcc17671c81aa1d3fe260d1e
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/services/java/com/android/server/BatteryService.java b/services/java/com/android/server/BatteryService.java
index 1aff9a2..ab9ae69 100644
--- a/services/java/com/android/server/BatteryService.java
+++ b/services/java/com/android/server/BatteryService.java
@@ -498,7 +498,7 @@
             return;
         }
 
-        if (args == null || args.length == 0) {
+        if (args == null || args.length == 0 || "-a".equals(args[0])) {
             synchronized (this) {
                 pw.println("Current Battery Service state:");
                 pw.println("  AC powered: " + mAcOnline);