feat: export-all-activities patch (#1751)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>

src/main/kotlin/app/revanced/patches/all/activity/exportAll/patch/ExportAllActivitiesPatch.kt

@@ -0,0 +1,45 @@
+package app.revanced.patches.all.activity.exportAll.patch
+
+import app.revanced.patcher.annotation.Description
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+import app.revanced.patcher.data.ResourceContext
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.patch.ResourcePatch
+import app.revanced.patcher.patch.annotations.Patch
+
+@Patch(false)
+@Name("export-all-activities")
+@Description("Makes all app activities exportable.")
+@Version("0.0.1")
+class ExportAllActivitiesPatch : ResourcePatch {
+    override fun execute(context: ResourceContext): PatchResult {
+        context.xmlEditor["AndroidManifest.xml"].use { editor ->
+            val document = editor.file
+            val activities = document.getElementsByTagName("activity")
+
+            for(i in 0..activities.length) {
+                activities.item(i)?.apply {
+                    val exportedAttribute = attributes.getNamedItem(EXPORTED_FLAG)
+
+                    if (exportedAttribute != null) {
+                        if (exportedAttribute.nodeValue != "true")
+                            exportedAttribute.nodeValue = "true"
+                    }
+                    // Reason why the attribute is added in the case it does not exist:
+                    // https://github.com/revanced/revanced-patches/pull/1751/files#r1141481604
+                    else document.createAttribute(EXPORTED_FLAG)
+                        .apply { value = "true" }
+                        .let(attributes::setNamedItem)
+                }
+            }
+        }
+
+        return PatchResultSuccess()
+    }
+
+    private companion object {
+        const val EXPORTED_FLAG = "android:exported"
+    }
+}