Use InstrumentationTestCase and get rid of AndroidTestCase.getTestContext call

package com.android.inputmethod.keyboard.internal;

import android.test.AndroidTestCase;

import android.app.Instrumentation;

import android.test.InstrumentationTestCase;

import java.lang.reflect.Field;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Locale;

public class KeySpecParserCsvTests extends AndroidTestCase {

public class KeySpecParserCsvTests extends InstrumentationTestCase {

    private final KeyboardTextsSet mTextsSet = new KeyboardTextsSet();

    @Override

    protected void setUp() throws Exception {

        super.setUp();

        final Instrumentation instrumentation = getInstrumentation();

        mTextsSet.setLanguage(Locale.ENGLISH.getLanguage());

        mTextsSet.loadStringResources(getContext());

        mTextsSet.loadStringResources(instrumentation.getTargetContext());

        final String[] testResourceNames = getAllResourceIdNames(

                com.android.inputmethod.latin.tests.R.string.class);

        mTextsSet.loadStringResourcesInternal(getTestContext(),

        mTextsSet.loadStringResourcesInternal(instrumentation.getContext(),

                testResourceNames,

                com.android.inputmethod.latin.tests.R.string.empty_string);

    }