Add guide for migrating translations from Android

Signal.xcodeproj/project.pbxproj

@@ -1408,6 +1408,7 @@
 		C35E8AA62485C85600ACB629 /* GeoLite2-Country-Blocks-IPv4.csv */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = "GeoLite2-Country-Blocks-IPv4.csv"; sourceTree = "<group>"; };
 		C35E8AAD2485E51D00ACB629 /* IP2Country.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IP2Country.swift; sourceTree = "<group>"; };
 		C3638C0424C7F0B500AF29BC /* LK002RemoveFriendRequests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LK002RemoveFriendRequests.swift; sourceTree = "<group>"; };
+		C3AA6BB824CE8F1B002358B6 /* Migrating Translations from Android.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = "Migrating Translations from Android.md"; sourceTree = "<group>"; };
 		C3DAB3232480CB2A00725F25 /* SRCopyableLabel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SRCopyableLabel.swift; sourceTree = "<group>"; };
 		C3DFFAC523E96F0D0058DAF8 /* Sheet.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Sheet.swift; sourceTree = "<group>"; };
 		C3DFFAC723E970080058DAF8 /* OpenGroupSuggestionSheet.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OpenGroupSuggestionSheet.swift; sourceTree = "<group>"; };
@@ -2605,6 +2606,7 @@
 			isa = PBXGroup;
 			children = (
 				B6F509951AA53F760068F56A /* Localizable.strings */,
+				C3AA6BB824CE8F1B002358B6 /* Migrating Translations from Android.md */,
 			);
 			name = Translations;
 			sourceTree = "<group>";

Signal/Migrating Translations from Android.md

@@ -0,0 +1,15 @@
+* Replace <string name=“ → “
+* Replace “> → “ = “
+* Replace </string> → “;
+* Replace activity_ → vc_
+* Replace fragment_ → vc_
+* Replace dialog_ → modal_
+* Replace Firebase Cloud Messaging → Apple Push Notification Service
+* Replace FCM → APNs
+* Replace fcm_ → apns_
+* Replace &gt; → >
+* Remove any \
+* Check for any unescaped “
+* Replace %1$s → %@
+* Replace %s → %@
+* Replace edit_text → text_field