Update the string of both magnification settings and gesture navigation tutorial dialog

Referenced link for the details:
https://docs.google.com/document/d/1eB2wukextG5UFECTwde5zcmXXTQCvgnqJJjnd1Chu9Q
https://docs.google.com/document/d/14iwCag7FBD4e9bR03HjbC0D2s_u-Fpr3K8vl_XMjkD0

Bug: 133336814
Bug: 133650388
Test: Visual
Change-Id: I4893183b55f609bfee3d1dfe80aa02cce624e857
1 file changed