lint: ressources clean up.

res/layout/frag_history_detail.xml

res/values-fr/strings.xml

res/values-fr/strings_account.xml

res/values-fr/strings_content_description.xml

res/values/arrays.xml

res/values/strings.xml

src/org/sflphone/account/AccountCredentials.java

src/org/sflphone/account/AccountDetail.java

src/org/sflphone/account/AccountDetailAdvanced.java

src/org/sflphone/account/AccountDetailBasic.java

src/org/sflphone/account/AccountDetailSrtp.java

src/org/sflphone/account/AccountDetailTls.java

src/org/sflphone/adapters/AccountSelectionAdapter.java

src/org/sflphone/adapters/MenuAdapter.java

src/org/sflphone/fragments/DetailsHistoryEntryFragment.java

src/org/sflphone/fragments/MenuFragment.java