[Wi-Fi] Add content description for the Openroaming help button.
1. Add content description for the Openroaming help button.
2. Exclude the showing of help button when isSubscription is true (e.g., Passpoint network)
Bug: 146669261
Test: Add 2 unit test cases:
1. helpButton_whenCanManageSubscription_shouldSetCorrectContentDescription: to check content description is set correctly.
2. subscriptionEntry_shouldSetImageButtonGone: to check button should hide when isSubscription true.
Change-Id: I51e927de3b9d2b35096364fd93835e02b29004fc
3 files changed