flutter_windowmanager_plus

Added

• FlutterWindowManagerPlus.setSecure(bool) as a single-call way to toggle FLAG_SECURE.
• Unit tests covering the platform channel calls for every public method.

Fixed

• Window flags are now re-applied when Android recreates the Activity (rotation, multi-window resize, "don't keep activities", locale change). Previously the new Activity got a fresh Window without the flags, so FLAG_SECURE was silently dropped and the app became screenshot-able again (#6).
• Flag validation compared flags & flag against 1 instead of 0, so every flag except bit 0 skipped validation entirely and invalid flags were passed straight through to Window#addFlags.
• Deprecated-but-functional flags (FLAG_SHOW_WHEN_LOCKED, FLAG_TURN_SCREEN_ON, FLAG_DISMISS_KEYGUARD, FLAG_BLUR_BEHIND, FLAG_DITHER, FLAG_TOUCHABLE_WHEN_WAKING) are no longer rejected on modern API levels.
• The native setSecure handler was unreachable: it required a flags argument that the call never carries, so it always failed with INVALID_ARGUMENT.
• addFlags/clearFlags no longer throw a type error when the platform returns null; they report false instead.

Changed

• Platform detection uses defaultTargetPlatform instead of Platform.isAndroid, so consumers can override the platform in their own unit tests and still assert that the plugin's methods are called (#5).
• Published compileSdk 36 (with AGP 8.13.0 / Kotlin 2.1.20), resolving the androidx.window:window:1.2.0 requires compileSdk 34+ build failure. This landed on main in 1.0.1 but was never released to pub.dev (#8).