Fix default textColor for TextView

TextView respects textViewStyle since appcompat-v7:22.2:

     public AppCompatTextView(Context context, AttributeSet attrs) {
-        this(context, attrs, 0);
+        this(context, attrs, android.R.attr.textViewStyle);
     }

This change in appcompat-v7 breaks previous behaviour by applying
textColorSecondary to TextViews: text becomes grey after upgrading
appcompat-v7 to 22.2.

See https://code.google.com/p/android/issues/detail?id=170476

F-Droid/res/values/styles.xml

@@ -9,6 +9,7 @@
         <item name="colorAccent">@color/fdroid_green</item>
         <item name="android:textColorLink">@color/fdroid_green</item>
         <item name="alertDialogTheme">@style/AlertDialogThemeDark</item>
+        <item name="android:textViewStyle">@style/TextViewStyle</item>
     </style>
 
     <style name="AppBaseThemeLight" parent="Theme.AppCompat.Light.DarkActionBar">
@@ -19,6 +20,7 @@
         <item name="colorAccent">@color/fdroid_green</item>
         <item name="android:textColorLink">@color/fdroid_green</item>
         <item name="alertDialogTheme">@style/AlertDialogThemeLight</item>
+        <item name="android:textViewStyle">@style/TextViewStyle</item>
     </style>
 
     <style name="AppThemeDark" parent="AppBaseThemeDark">
@@ -46,6 +48,10 @@
         <item name="colorAccent">@color/fdroid_green</item>
     </style>
 
+    <style name="TextViewStyle" parent="android:Widget.TextView">
+        <item name="android:textColor">?android:attr/textColorPrimary</item>
+    </style>
+
     <style name="RepoDetailsCaption">
         <item name="android:paddingTop">16dp</item>
         <item name="android:paddingBottom">4dp</item>