Add cts tests for DPM.setMeteredDataDisabled.

Bug: 63700027
Test: cts-tradefed run singleCommand cts-dev -m CtsDevicePolicyManagerTestCases -t \
      com.android.cts.devicepolicy.MixedDeviceOwnerTest#testSetMeteredDataDisabled
Test: cts-tradefed run singleCommand cts-dev -m CtsDevicePolicyManagerTestCases -t \
      com.android.cts.devicepolicy.MixedProfileOwnerTest#testSetMeteredDataDisabled
Change-Id: Ia7e290883d275807d1c595a0669e578e87a69f1d
6 files changed