Some Mobile code labeling and removed magic numbers (#993)

* Macro loop for EmptyAllSRAMBanks

* Many things labeled and magic numbers removed

* Conform to the style guide

* Rename URLs in mobile_46

* MOBILEAPI_19 -> MOBILEAPI_TELEPHONESTATUS

* Update engine/menus/empty_sram.asm

Co-authored-by: Rangi <35663410+Rangi42@users.noreply.github.com>

* Update ram/wram.asm

Co-authored-by: Rangi <35663410+Rangi42@users.noreply.github.com>

* Update mobile/mobile_46.asm

Co-authored-by: Rangi <35663410+Rangi42@users.noreply.github.com>

* Update mobile/mobile_46.asm

Co-authored-by: Rangi <35663410+Rangi42@users.noreply.github.com>

* Remove underscore from Set*DownloadURL symbols

* Begin Labeling TradeCornerHoldMon routines

* Add wMobileMon party_struct

* Add TRADE_CORNER_REQUEST_LENGTH constant

* Name battle tower action functions

* Label trade corner send/receive buffer

* Label the saved copy of the trade corner pokemon

also fix mailmsg_jp

* So many copies of decodeBase64Character

* Label another buffer

* Fix Alignment and use MOBILE_EMAIL_LENGTH

* `Function11ad8a` -> `MobileIncJumptableIndex`

* Apply Rangi Suggestions pass 1

Co-Authored-By: Rangi <35663410+Rangi42@users.noreply.github.com>

* Apply Suggestions 2

Co-authored-by: Rangi <35663410+Rangi42@users.noreply.github.com>
Co-authored-by: vulcandth <vulcandth@gmail.com>

layout.link

@@ -342,6 +342,8 @@ WRAMX 2
 	"Pic Animations"
 WRAMX 3
 	"Battle Tower RAM"
+WRAMX 4
+	"News Script RAM"
 WRAMX 5
 	align 8
 	"GBC Video"