[android] Unify accent color across the app

This is a follow-up for bfe401a602. Original MAPS.ME blue (#249CF2)
color left untouched just by a mistake. One accent color (#006c35) as
for the logo is more than enough for this design system. The app looks
less old-fashioned and more consistent, solid and "organic". The night
theme is not affected and a variation of blue is used as green counterpart.

Signed-off-by: Roman Tsisyk <roman@tsisyk.com>

android/res/values/colors.xml

@@ -8,7 +8,7 @@
   <color name="text_light_subtitle">@color/white_secondary</color>
   <color name="text_light_hint">@color/white_lightest</color>
 
-  <color name="base_accent">#FF249CF2</color>
+  <color name="base_accent">#FF006C35</color>
   <color name="base_accent_night">#FF4BB9E6</color>
   <color name="base_accent_pressed">#FF1C85D6</color>
   <color name="base_accent_pressed_night">#FF3C9BBE</color>

android/res/values/styles.xml

@@ -53,6 +53,7 @@
 
   <style name="MwmWidget.Button.Accent">
     <item name="android:background">?accentButtonBackground</item>
+    <item name="android:textColor">?accentButtonTextColor</item>
   </style>
 
   <style name="MwmWidget.Button.StackedButtonsDialog">