Minamp 1.6: adjustable UI size, larger text and controls

- New setting "Text and button size" (Normal / Large / Extra large): scales
  text, icons and buttons on top of the phone's density (App.UI_SCALES)
- Larger default text, rows, tiles, touch targets and player icons; all sizes
  now live in res/values/dimens.xml
- Seek bar knob drawn in code, since Android 2.x caches XML shapes at the
  size they were first loaded
- Full-width buttons wrap to two lines instead of cutting words off
- Shorter labels so they fit 240x320 screens in both languages
- tools/check_fit.py checks that UI texts fit their slots at every size and
  language using Droid Sans metrics; build.sh runs it and setup_toolchain.sh
  fetches the font

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

res/layout/view_detail_header.xml

@@ -10,7 +10,7 @@
         android:layout_height="wrap_content"
         android:orientation="horizontal">
         <ImageView android:id="@+id/detail_art"
-            android:layout_width="104dp" android:layout_height="104dp"
+            android:layout_width="@dimen/detail_art" android:layout_height="@dimen/detail_art"
             android:scaleType="centerCrop" />
         <LinearLayout
             android:layout_width="0dp" android:layout_height="wrap_content"
@@ -18,11 +18,11 @@
             android:paddingLeft="12dp" android:paddingTop="4dp">
             <TextView android:id="@+id/detail_title"
                 android:layout_width="match_parent" android:layout_height="wrap_content"
-                android:textSize="17sp" android:textStyle="bold" android:maxLines="3"
+                android:textSize="@dimen/text_detail_title" android:textStyle="bold" android:maxLines="3"
                 android:ellipsize="end" android:textColor="@color/text" />
             <TextView android:id="@+id/detail_sub"
                 android:layout_width="match_parent" android:layout_height="wrap_content"
-                android:textSize="13sp" android:textColor="@color/accent"
+                android:textSize="@dimen/text_np_sub" android:textColor="@color/accent"
                 android:paddingTop="2dp" android:singleLine="true" android:ellipsize="end" />
             <TextView android:id="@+id/detail_meta" style="@style/Sub"
                 android:layout_width="match_parent" android:layout_height="wrap_content"
@@ -37,9 +37,11 @@
         android:paddingTop="10dp">
         <Button android:id="@+id/detail_play" style="@style/ButtonAccent"
             android:layout_width="0dp" android:layout_weight="1"
-            android:layout_marginRight="5dp" android:text="@string/play" />
+            android:layout_marginRight="5dp" android:text="@string/play"
+            android:paddingLeft="4dp" android:paddingRight="4dp" />
         <Button android:id="@+id/detail_shuffle" style="@style/ButtonOutline"
             android:layout_width="0dp" android:layout_weight="1"
-            android:layout_marginLeft="5dp" android:text="@string/shuffle" />
+            android:layout_marginLeft="5dp" android:text="@string/shuffle"
+            android:paddingLeft="4dp" android:paddingRight="4dp" />
     </LinearLayout>
 </LinearLayout>