Rephrase dialog message of clear storage dialog for security concern

Bug: 193890833
Test: visual
Change-Id: I8f0b066de710169ee8b922c44b6519ca21b9c7ef
(cherry picked from commit 0c359da620498d536d81cb97d5ae48048201c226)
(cherry picked from commit 5549bf8cd03bcd5e71dbcf825301f5cbe0224d61)
Merged-In:I8f0b066de710169ee8b922c44b6519ca21b9c7ef
1 file changed