Fix C/C++ compiler generated warnings
* Remove unused functions: -Wno-unused-function
* Fix logical operations that are missing parentheses:
-Wno-logical-not-parentheses, -Wno-parentheses
* Add missing braces in initializers: -Wno-missing-braces
* Remove unused variables: -Wno-unused-variable
* Fix printf()-like formatting issues: -Wno-format
* Avoid using unitialized variables:
-Wno-maybe-uninitialized, -Wno-uninitialized
* Fix a bug inside bta_gattc_get_gatt_db_impl()
when the processed GATT DB attribute type is unknown.
* Fix warnings about missing field initializers:
-Wno-missing-field-initializers
* Re-implement macro COMPILE_ASSERT(COND) to fix a compilation warning:
-Wno-non-literal-null-conversion
* Fix sign mismatch comparison warnings:
-Wno-sign-compare
* Fix warnings related to enum conversion:
-Wno-enum-conversion
* Fix warnings related to incompatible pointer types:
-Wno-incompatible-pointer-types
* Fix warnings related to enum conversion:
-Wno-enum-conversion
Bug:
26879229
Change-Id: I522931fe156aeab23ae841051a9e25ceab00b1c2