Add Basic PreferenceActivityTest

Add a new package for "android.preference.cts" and add some basic tests
for PreferenceActivity.

Change-Id: I0db5b6550a9223eeaafe6cb420d0b959755e784b
diff --git a/development/ide/eclipse/.classpath b/development/ide/eclipse/.classpath
index f3b4137..3f11bd1 100644
--- a/development/ide/eclipse/.classpath
+++ b/development/ide/eclipse/.classpath
@@ -37,6 +37,7 @@
     <classpathentry kind="src" path="cts/tests/tests/performance5/src"/>
     <classpathentry kind="src" path="cts/tests/tests/permission/src"/>
     <classpathentry kind="src" path="cts/tests/tests/permission2/src"/>
+    <classpathentry kind="src" path="cts/tests/tests/preference/src"/>
     <classpathentry kind="src" path="cts/tests/tests/provider/src"/>
     <classpathentry kind="src" path="cts/tests/tests/speech/src"/>
     <classpathentry kind="src" path="cts/tests/tests/telephony/src"/>