Use a separate layout for LinearLayout_LayoutParams tests

So that it doesn't clash with ScrollView parent used for
LinearLayout tests

Bug: 62939333
Test: adb shell am instrument -e class 'android.widget.cts.LinearLayoutTest' -w 'android.widget.cts/android.support.test.runner.AndroidJUnitRunner'
Test: adb shell am instrument -e class 'android.widget.cts.LinearLayout_LayoutParamsTest' -w 'android.widget.cts/android.support.test.runner.AndroidJUnitRunner'
Change-Id: Ia865a47f8b753ac71d2249a7d14366f68bdaff1c
3 files changed