Android wait for activity fix for API 17 (waiting for activity to become focused)

Changed the regular expression in ADB.prototype.waitForActivity to make the period optional at the begining of the activity.  At least for API 17 I
don't see it.

Here is the line for mFocusedApp for my app:
mFocusedApp=AppWindowToken{b52c36d0 token=Token{b524e338 ActivityRecord{b528ae18 u0 com.xxxxx.android.root/com.xxxxx.android.activity.LoginScreenActivity}}}