Use theme color for swipe trail

java/src/org/futo/inputmethod/keyboard/MainKeyboardView.java

@@ -250,7 +250,7 @@ public final class MainKeyboardView extends KeyboardView implements DrawingProxy
                 mainKeyboardViewAttr);
         mGestureFloatingTextDrawingPreview.setDrawingView(drawingPreviewPlacerView);
 
-        mGestureTrailsDrawingPreview = new GestureTrailsDrawingPreview(mainKeyboardViewAttr);
+        mGestureTrailsDrawingPreview = new GestureTrailsDrawingPreview(mainKeyboardViewAttr, mDrawableProvider);
         mGestureTrailsDrawingPreview.setDrawingView(drawingPreviewPlacerView);
 
         mSlidingKeyInputDrawingPreview = new SlidingKeyInputDrawingPreview(mainKeyboardViewAttr);

java/src/org/futo/inputmethod/keyboard/internal/GestureTrailDrawingParams.java

@@ -19,6 +19,7 @@ package org.futo.inputmethod.keyboard.internal;
 import android.content.res.TypedArray;
 
 import org.futo.inputmethod.latin.R;
+import org.futo.inputmethod.latin.uix.DynamicThemeProvider;
 
 /**
  * This class holds parameters to control how a gesture trail is drawn and animated on the screen.
@@ -49,9 +50,11 @@ final class GestureTrailDrawingParams {
 
     public final int mTrailLingerDuration;
 
-    public GestureTrailDrawingParams(final TypedArray mainKeyboardViewAttr) {
-        mTrailColor = mainKeyboardViewAttr.getColor(
-                R.styleable.MainKeyboardView_gestureTrailColor, 0);
+    public GestureTrailDrawingParams(final TypedArray mainKeyboardViewAttr, DynamicThemeProvider provider) {
+        mTrailColor = DynamicThemeProvider.Companion.getColorOrDefault(
+                R.styleable.MainKeyboardView_gestureTrailColor, 0,
+                mainKeyboardViewAttr, provider
+        );
         mTrailStartWidth = mainKeyboardViewAttr.getDimension(
                 R.styleable.MainKeyboardView_gestureTrailStartWidth, 0.0f);
         mTrailEndWidth = mainKeyboardViewAttr.getDimension(

java/src/org/futo/inputmethod/keyboard/internal/GestureTrailsDrawingPreview.java

@@ -28,6 +28,7 @@ import android.os.Handler;
 import android.util.SparseArray;
 
 import org.futo.inputmethod.keyboard.PointerTracker;
+import org.futo.inputmethod.latin.uix.DynamicThemeProvider;
 
 /**
  * Draw preview graphics of multiple gesture trails during gesture input.
@@ -47,8 +48,8 @@ public final class GestureTrailsDrawingPreview extends AbstractDrawingPreview im
 
     private final Handler mDrawingHandler = new Handler();
 
-    public GestureTrailsDrawingPreview(final TypedArray mainKeyboardViewAttr) {
-        mDrawingParams = new GestureTrailDrawingParams(mainKeyboardViewAttr);
+    public GestureTrailsDrawingPreview(final TypedArray mainKeyboardViewAttr, DynamicThemeProvider provider) {
+        mDrawingParams = new GestureTrailDrawingParams(mainKeyboardViewAttr, provider);
         final Paint gesturePaint = new Paint();
         gesturePaint.setAntiAlias(true);
         gesturePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));

java/src/org/futo/inputmethod/latin/uix/BasicThemeProvider.kt

@@ -193,6 +193,7 @@ class BasicThemeProvider(val context: Context, val overrideColorScheme: ColorSch
         colors[R.styleable.Keyboard_Key_keyShiftedLetterHintActivatedColor] = onBackgroundHalf
         colors[R.styleable.Keyboard_Key_keyPreviewTextColor] = onSecondary
         colors[R.styleable.MainKeyboardView_languageOnSpacebarTextColor] = onBackgroundHalf
+        colors[R.styleable.MainKeyboardView_gestureTrailColor] = primary
 
         val overrideDrawable: (Int, Int, Int) -> Unit = { a, b, color ->
             drawables[a] = AppCompatResources.getDrawable(