GrayPause 1.4: grayscale color breaks for Android

Timers that switch grayscale off and restore it on their own: presets and
custom h/m/s timers, Quick Settings tile, launcher shortcuts, countdown
notification, reboot recovery, and optional always-in-color apps via an
accessibility service. WRITE_SECURE_SETTINGS is granted once via Shizuku
or adb.

Gradle project for F-Droid with fastlane metadata and a draft fdroiddata
recipe; build.sh keeps the Gradle-free on-phone Termux build.

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

tools/ZipAlign.java

@@ -0,0 +1,55 @@
+import java.io.*;
+import java.util.*;
+import java.util.zip.*;
+
+/**
+ * Minimal zipalign: copies a zip, padding STORED entries so their data is 4-byte aligned,
+ * and appends any extra files given after the output path (compressed, at the zip root).
+ */
+public class ZipAlign {
+    public static void main(String[] a) throws IOException {
+        try (ZipFile in = new ZipFile(a[0]);
+             CountingOut cnt = new CountingOut(new BufferedOutputStream(new FileOutputStream(a[1])));
+             ZipOutputStream out = new ZipOutputStream(cnt)) {
+            for (ZipEntry e : Collections.list(in.entries())) {
+                ZipEntry n = new ZipEntry(e.getName());
+                n.setMethod(e.getMethod());
+                n.setTime(946684800000L); // 2000-01-01, inside the DOS date range (no extra timestamp field)
+                if (e.getMethod() == ZipEntry.STORED) {
+                    n.setSize(e.getSize());
+                    n.setCompressedSize(e.getSize());
+                    n.setCrc(e.getCrc());
+                    out.flush();
+                    long dataStart = cnt.count + 30 + n.getName().getBytes("UTF-8").length;
+                    int pad = (int) ((4 - dataStart % 4) % 4);
+                    if (pad > 0) n.setExtra(padExtra(pad));
+                }
+                out.putNextEntry(n);
+                in.getInputStream(e).transferTo(out);
+                out.closeEntry();
+            }
+            for (int i = 2; i < a.length; i++) {
+                File f = new File(a[i]);
+                ZipEntry n = new ZipEntry(f.getName());
+                n.setTime(946684800000L);
+                out.putNextEntry(n);
+                try (InputStream fin = new FileInputStream(f)) { fin.transferTo(out); }
+                out.closeEntry();
+            }
+        }
+    }
+
+    // An extra field needs a 4-byte header, so use one field of pad+4 bytes (Android's 0xD935 alignment tag).
+    static byte[] padExtra(int pad) {
+        byte[] x = new byte[pad + 4];
+        x[0] = 0x35; x[1] = (byte) 0xD9; x[2] = (byte) pad;
+        return x;
+    }
+
+    static class CountingOut extends FilterOutputStream {
+        long count;
+        CountingOut(OutputStream o) { super(o); }
+        @Override public void write(int b) throws IOException { out.write(b); count++; }
+        @Override public void write(byte[] b, int off, int len) throws IOException { out.write(b, off, len); count += len; }
+    }
+}