Revert "Revert "Revert "Drop all path-related methods from android::String8"""

This reverts commit 4b6a7c3940bc6d5e89e15179d8d49600e6dd4857.

Reason for revert: b/299695302, b/299694769

Change-Id: I89c6719d23446f2f9ce24e5b75d321538b580431
5 files changed