android: fix Lite Mode FRE a11y support

This CL changes the TextView for the Lite Mode FRE and Second Run Promo
to use TextViewWithClickableSpans so double tap to follow the link works
in Talkback mode.

Bug: 1029466
Change-Id: I624b4c94f2992c6dcf26dd872b5ed448730568d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1948058Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Trevor  Perrier <perrier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721825}

chrome/android/java/res/layout/fre_data_reduction_proxy_lite_mode.xml

@@ -56,7 +56,7 @@
                     android:layout_marginStart="@dimen/fre_content_margin"
                     android:orientation="vertical" >
 
-                    <TextView
+                    <org.chromium.ui.widget.TextViewWithClickableSpans
                         android:id="@+id/data_reduction_promo_summary_text"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"

chrome/browser/ui/android/widget/java/res/layout/promo_dialog_layout.xml

@@ -67,7 +67,7 @@
                         android:layout_marginBottom="@dimen/dialog_header_margin"
                         android:textAppearance="@style/TextAppearance.BlackHeadline" />
 
-                    <org.chromium.ui.widget.TextViewWithLeading
+                    <org.chromium.ui.widget.TextViewWithClickableSpans
                         android:id="@+id/subheader"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"