Inline and fix proguard rules

Summary:
The original proguard rules are put in the template, which is not very convenient and easy to get wrong. Because new rules get put, people also has two copy paste the rule. And there are also existing project import react native as a dependency. So the best way to  keep a android library project proguard rule is to manage the rule itself, using `consumerProguardFiles` like [dagger](https://github.com/JakeWharton/butterknife/blob/46baef6d96e93a1872efa17fdfc1d2af59b36f0c/butterknife/build.gradle#L9) and other android library project.

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Use RNTester to build the release flavor (now it has bugs facebook/react-native#18460, I keep my change in local for now), after build success, run to check if crash.

In the process, I also fix facebook/react-native#12994 and facebook/react-native#6624 by adding the following to proguard rules
```proguard
-keep,includedescriptorclasses class com.facebook.react.bridge.** { *; }
```

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[ANDROID] [ENHANCEMENT and BUGFIX] [Proguard rules] - inline and fix proguard rules .

<!--
  **INTERNAL and MINOR tagged notes will not be included in the next version's final release notes.**

    CATEGORY
  [----------]      TYPE
  [ CLI      ] [-------------]    LOCATION
  [ DOCS     ] [ BREAKING    ] [-------------]
  [ GENERAL  ] [ BUGFIX      ] [ {Component} ]
  [ INTERNAL ] [ ENHANCEMENT ] [ {Filename}  ]
  [ IOS      ] [ FEATURE     ] [ {Directory} ]   |-----------|
  [ ANDROID  ] [ MINOR       ] [ {Framework} ] - | {Message} |
  [----------] [-------------] [-------------]   |-----------|

 EXAMPLES:

 [IOS] [BREAKING] [FlatList] - Change a thing that breaks other things
 [ANDROID] [BUGFIX] [TextInput] - Did a thing to TextInput
 [CLI] [FEATURE] [local-cli/info/info.js] - CLI easier to do things with
 [DOCS] [BUGFIX] [GettingStarted.md] - Accidentally a thing/word
 [GENERAL] [ENHANCEMENT] [Yoga] - Added new yoga thing/position
 [INTERNAL] [FEATURE] [./scripts] - Added thing to script that nobody will see
-->
Closes facebook/react-native#18461

Differential Revision: D7527533

Pulled By: hramos

fbshipit-source-id: 447dbc16983bcfb597187b40c1be3987a8c5a832

templates/HelloWorld/android/app/proguard-rules.pro

@@ -15,75 +15,3 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
-
-# Disabling obfuscation is useful if you collect stack traces from production crashes
-# (unless you are using a system that supports de-obfuscate the stack traces).
-# -dontobfuscate
-
-# React Native
-
-# Keep our interfaces so they can be used by other ProGuard rules.
-# See http://sourceforge.net/p/proguard/bugs/466/
--keep,allowobfuscation @interface com.facebook.proguard.annotations.DoNotStrip
--keep,allowobfuscation @interface com.facebook.proguard.annotations.KeepGettersAndSetters
--keep,allowobfuscation @interface com.facebook.common.internal.DoNotStrip
-
-# Do not strip any method/class that is annotated with @DoNotStrip
--keep @com.facebook.proguard.annotations.DoNotStrip class *
--keep @com.facebook.common.internal.DoNotStrip class *
--keepclassmembers class * {
-    @com.facebook.proguard.annotations.DoNotStrip *;
-    @com.facebook.common.internal.DoNotStrip *;
-}
-
--keepclassmembers @com.facebook.proguard.annotations.KeepGettersAndSetters class * {
-  void set*(***);
-  *** get*();
-}
-
--keep class * extends com.facebook.react.bridge.JavaScriptModule { *; }
--keep class * extends com.facebook.react.bridge.NativeModule { *; }
--keepclassmembers,includedescriptorclasses class * { native <methods>; }
--keepclassmembers class *  { @com.facebook.react.uimanager.UIProp <fields>; }
--keepclassmembers class *  { @com.facebook.react.uimanager.annotations.ReactProp <methods>; }
--keepclassmembers class *  { @com.facebook.react.uimanager.annotations.ReactPropGroup <methods>; }
-
--dontwarn com.facebook.react.**
-
-# TextLayoutBuilder uses a non-public Android constructor within StaticLayout.
-# See libs/proxy/src/main/java/com/facebook/fbui/textlayoutbuilder/proxy for details.
--dontwarn android.text.StaticLayout
-
-# Fresco
-# Keep our interfaces so they can be used by other ProGuard rules.
-# See http://sourceforge.net/p/proguard/bugs/466/
--keep,allowobfuscation @interface com.facebook.soloader.DoNotOptimize
-
-# Do not strip any method/class that is annotated with @DoNotOptimize
--keep @com.facebook.soloader.DoNotOptimize class *
--keepclassmembers class * {
-    @com.facebook.soloader.DoNotOptimize *;
-}
-
-# Keep native methods
--keepclassmembers class * {
-    native <methods>;
-}
-
--dontwarn javax.annotation.**
--dontwarn com.facebook.infer.**
-
-# okhttp
-
--keepattributes Signature
--keepattributes *Annotation*
--keep class okhttp3.** { *; }
--keep interface okhttp3.** { *; }
--dontwarn okhttp3.**
-
-# okio
-
--keep class sun.misc.Unsafe { *; }
--dontwarn java.nio.file.*
--dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
--dontwarn okio.**