Split UpdatesGridGlanceWidget into smaller bits (#8991)

- Renamed Composables
- Moved Constants to core module

(cherry picked from commit 2501fef9e4800e6a616b418d1cbec0ea2b9e282e)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/search/SourceSearchScreen.kt

core/src/main/java/tachiyomi/core/Constants.kt

@@ -0,0 +1,18 @@
+package tachiyomi.core
+
+object Constants {
+    const val URL_HELP = "https://tachiyomi.org/help/"
+
+    const val MANGA_EXTRA = "manga"
+
+    const val MAIN_ACTIVITY = "eu.kanade.tachiyomi.ui.main.MainActivity"
+
+    // Shortcut actions
+    const val SHORTCUT_LIBRARY = "eu.kanade.tachiyomi.SHOW_LIBRARY"
+    const val SHORTCUT_MANGA = "eu.kanade.tachiyomi.SHOW_MANGA"
+    const val SHORTCUT_UPDATES = "eu.kanade.tachiyomi.SHOW_RECENTLY_UPDATED"
+    const val SHORTCUT_HISTORY = "eu.kanade.tachiyomi.SHOW_RECENTLY_READ"
+    const val SHORTCUT_SOURCES = "eu.kanade.tachiyomi.SHOW_CATALOGUES"
+    const val SHORTCUT_EXTENSIONS = "eu.kanade.tachiyomi.EXTENSIONS"
+    const val SHORTCUT_DOWNLOADS = "eu.kanade.tachiyomi.SHOW_DOWNLOADS"
+}