Custom mobile security notifications for Safety Center

Per recent UX feedback, notifications should not have clickable links.
Includes support for updated strings.

Bug: b/283336425
Test: m & manual
Flag: ComAndroidInternalTelephonyFlagsEnableIdentifierDisclosureTransparencyUnsolEventsLaunch
ComAndroidInternalTelephonyFlagsEnableIdentifierDisclosureTransparencyLaunch
ComAndroidInternalTelephonyFlagsEnableModemCipherTransparencyUnsolEventsLaunch
ComAndroidInternalTelephonyFlagsEnableModemCipherTransparencyLaunch

Change-Id: I07f145ae9e76a371d1fdc81fc0dbb773a97d6206