Add config for "Share" action in TextView context menu

"Share" text action is not applicable to all platforms, this config
allows disabling the action item.
Example - Automotive (AAOS) does not support it

Bug: 162463255

Test: atest TextViewTest EditTextTest, manual check
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:712f9d38e3ea2b42fad56b52fbaed83442f2856e)
Merged-In: I825a85bdf566c0a319bd91b523284757af6be68e
Change-Id: I825a85bdf566c0a319bd91b523284757af6be68e