Don't reset battery status before disabling battery saver mode.

Resetting battery status makes the "disabling battery saver mode"
operation that follows it a no-op if the device is plugged-in to power.
In this case, sticky battery saver status won't get reset and might
affect the tests following it.

Also, change back turnBatteryOff -> "cmd battery reset" since issue "72502904"
is fixed now.

Fixes: 77236363
Test: cts-tradefed run singleCommand cts-dev -m CtsHostsideNetworkTests -t \
      com.android.cts.net.HostsideRestrictBackgroundNetworkTests

Change-Id: I93e11c714200e8de6864a3bd7627eb66842a39d1

tests/cts/hostside/AndroidTest.xml

@@ -17,6 +17,12 @@
     <option name="test-suite-tag" value="cts" />
     <option name="config-descriptor:metadata" key="component" value="networking" />
     <target_preparer class="com.android.cts.net.NetPolicyTestsPreparer" />
+
+    <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer">
+        <option name="teardown-command" value="cmd power set-mode 0" />
+        <option name="teardown-command" value="cmd battery reset" />
+    </target_preparer>
+
     <test class="com.android.compatibility.common.tradefed.testtype.JarHostTest" >
         <option name="jar" value="CtsHostsideNetworkTests.jar" />
         <option name="runtime-hint" value="3m56s" />

tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java

@@ -148,7 +148,6 @@ abstract class AbstractRestrictBackgroundNetworkTestCase extends Instrumentation
 
     @Override
     protected void tearDown() throws Exception {
-        batteryReset();
         if (!mIsLocationOn) {
             disableLocation();
         }
@@ -810,20 +809,12 @@ abstract class AbstractRestrictBackgroundNetworkTestCase extends Instrumentation
 
     protected void turnBatteryOn() throws Exception {
         executeSilentShellCommand("cmd battery unplug");
-        executeSilentShellCommand("cmd battery set status "
-                + BatteryManager.BATTERY_STATUS_NOT_CHARGING);
         assertBatteryState(false);
     }
 
     protected void turnBatteryOff() throws Exception {
-        executeSilentShellCommand("cmd battery set ac " + BatteryManager.BATTERY_PLUGGED_AC);
-        executeSilentShellCommand("cmd battery set status "
-                + BatteryManager.BATTERY_STATUS_CHARGING);
-        assertBatteryState(true);
-    }
-
-    private void batteryReset() throws Exception {
         executeSilentShellCommand("cmd battery reset");
+        assertBatteryState(true);
     }
 
     private void assertBatteryState(boolean pluggedIn) throws Exception {